4,6-di- and 2,4,6-trisubstituted quinazoline derivatives and pharmaceutical compositions useful for treating viral infections

ABSTRACT

This invention provides the treatment of viral infections with a 4,6-disubstituted or 2,4,6-trisubstituted quinazoline derivative represented by the structural formula [(I)] wherein: R 2  is selected from the group consisting of hydrogen, NR′R″ and C 1-7  alkyl; —A is selected from the group consisting of a bond, O, S(O) n , C 1-7  alkylene, C 2-7  alkenylene and C 2-7  alkynylene; R 4  is selected from the group consisting of C 1-7  alkyl, C 2-7  alkenyl, C 3-10 cycloalkyl, C 3-10  cycloalkenyl, aryl, heterocyclic, arylalkyl, heterocyclic-substituted alkyl and cycloalkyl-alkyl; —Y is selected from the group consisting of a single bond, C 1-7  alkylene, C 2-7  alkenylene, and C 2-7  alkynylene; n is 0, 1 or 2; and R 6  is selected from the group consisting of halogen, heteroaryl and aryl; a pharmaceutically acceptable addition salt, a stereoisomer, a mono- or a di-Λ/-oxide, a solvate or a pro-drug thereof.

The present invention relates to a class of novel 4,6-di- and 2,4,6-trisubstituted quinazoline derivatives, as well as to pharmaceutical compositions comprising one or more of said 4,6-di- and 2,4,6-trisubstituted quinazoline derivatives and one or more pharmaceutically acceptable excipients. The present invention further relates to the use of said novel 4,6-di- and 2,4,6-trisubstituted quinazoline derivatives as biologically active ingredients for manufacturing medicaments, more specifically for the prevention or treatment of viral infections and pathologic conditions associated therewith such as, but not limited to, hepatitis C.

BACKGROUND OF THE INVENTION

A large number of substituted quinazoline derivatives is already known in the art. For instance quinazoline derivatives with various substituents on positions 2, 4 and 6 (using the standard atom numbering for the quinazoline moiety) are known with biological activities such as, but not limited to, for the treatment or prevention of inflammatory disorders, immune disorders, hyper-proliferative disorders such as cancer, and viral infections.

The standard numbering of atoms amenable for substitution on the quinazoline core structure is as follows:

WO 2005/105761 discloses quinazoline derivatives substituted on position 4 with an optionally substituted 4-morpholino-anilino group which are useful for the treatment or prevention of Flaviviridae infections such as, but not limited to, hepatitis C virus (hereinafter referred as HCV) infection.

WO 98/02434 discloses 2,4,6-substituted quinazoline derivatives, wherein the substituent on position 4 comprises at least a dual ring system, being protein tyrosine kinase inhibitors which are useful for the treatment of cancer and psoriasis.

WO 2006/039718 discloses 2,6-substituted quinazolines and 4-amino-2,6-substituted quinazolines being also protein kinase inhibitors.

However there is a continuous need in the art for specific and highly therapeutically active compounds for preventing or treating viral infections, in particular infections due to Flaviridae and pathologic conditions associated therewith, especially hepatitis C. In particular, there is a need in the art to provide drugs which are active against hepatitis C in a minor dose in order to replace existing drugs having significant side effects and to decrease treatment costs.

Hepatitis is an inflammation of the liver that is most often caused by infection with one of three viruses known as hepatitis A, B or C. Hepatitis A virus (HAV) infection is the most common cause of acute hepatitis, and usually resolves spontaneously after several weeks of acute symptoms. Hepatitis B virus (HBV) and hepatitis C virus (HCV) are the most common viral causes of chronic hepatitis, usually defined as liver inflammation persisting for more than six months. HCV is the second most common cause of viral hepatitis in general and most common cause of chronic hepatitis. The World Health Organization estimates that worldwide 170 million people (3% of the world's population) are chronically infected with HCV. These chronic carriers are at risk of developing cirrhosis and/or liver cancer. In studies with a 10 to 20 year follow-up, cirrhosis developed in 20-30% of the patients, 1-5% of whom may develop liver cancer during the next then years. The 15% to 45% of persons with acute hepatitis C who do recover are not subject to long-term complications and do not need treatment. Since HCV and pestiviruses belong to the same virus family and share many similarities (such as, but not limited to, organisation of the genome, analogous gene products and replication cycle), pestiviruses may be adopted as a model virus and surrogate for HCV. For example the Bovine Viral Diarrhea Virus (BVDV) is closely related to hepatitis C virus (HCV) and may be used as a surrogate virus in drug development for HCV infection.

HCV is a representative and highly significant member of the Flaviviridae family, a family of positive-strand RNA viruses. This family includes the following genera: Genus Flavivirus (type species Yellow fever virus, others include West Nile virus and Dengue Fever), Genus Hepacivirus (type species Hepatitis C virus), and Genus Pestivirus (type species Bovine viral diarrhea virus (BVDV), others include classical swine fever or hog cholera). Contrary to other families of positive strand RNA viruses such as human immunodeficiency virus (HIV), HCV seems incapable of integrating into the host's genome. The primary immune response to HCV is mounted by cytotoxic T lymphocytes. Unfortunately, this process fails to eradicate infection in most people; in fact, it may contribute to liver inflammation and, ultimately, tissue necrosis. The ability of HCV to escape immune surveillance is the subject of much speculation. One likely means of viral persistence relies on the presence of closely related but heterogeneous populations of viral genomes. Further studies of these quasi-species enable classification of several genotypes and subtypes, which have clinical implications.

The diagnosis of hepatitis C is rarely made during the acute phase of the disease because the majority of people infected experience no symptoms during this phase of the disease. Those who do experience acute phase symptoms are rarely ill enough to seek medical attention. The diagnosis of chronic phase hepatitis C is also challenging due to the absence or lack of specificity of symptoms until advanced liver disease develops, which may not occur until decades into the disease.

Hepatitis C testing begins with serological blood tests used to detect antibodies to HCV. Anti-HCV antibodies can be detected in about 80% of patients within 15 weeks after exposure, in more than 90% of patients within 5 months after exposure, and in more than 97% of patients by 6 months after exposure. Overall, HCV antibody tests have a strong positive predictive value for exposure to the hepatitis C virus, but may miss patients who have not yet developed antibodies (seroconversion), or have an insufficient level of antibodies to detect. Anti-HCV antibodies indicate exposure to the virus, but cannot determine if ongoing infection is present. All persons with positive anti-HCV antibody tests must undergo additional testing for the presence of the hepatitis C virus itself to determine whether current infection is present. The presence of HCV may be tested by using molecular nucleic acid testing methods such as, but not limited to, polymerase chain reaction (PCR), transcription mediated amplification (TMA), or branched DNA amplification. All HCV nucleic acid molecular tests have the capacity to detect not only whether the virus is present, but also to measure the amount of virus present in the blood (the HCV viral load). The HCV viral load is an important factor in determining the probability of response to interferon-base therapy, but does not indicate disease severity nor the likelihood of disease progression.

The goal of treatment is to prevent complications of HCV infection. This is principally achieved by eradication of infection. Accordingly, treatment responses are frequently characterized by the results of HCV RNA testing. Infection is considered eradicated when there is a sustained virologic response (SVR), defined as the absence of HCV RNA in serum by a sensitive test at the end of treatment and 6 months later. Persons who achieve an SVR almost always have a dramatic earlier reduction in the HCV RNA level, referred to as an early virologic response (EVR). Continued absence of detectable virus at termination of treatment is referred to as end of treatment response (ETR). A patient is considered relapsed when HCV RNA becomes undetectable on treatment but is detected again after discontinuation of treatment. Persons in whom HCV RNA levels remain stable on treatment are considered as non-responders, while those whose HCV RNA levels decline but remain detectable are referred to as partial responders.

Current standard of care for HCV treatment is a combination of (pegylated) interferon alpha and the antiviral drug ribavirin for a period of 24 or 48 weeks, depending upon the viral genotype. Should treatment with pegylated ribavirin-interferon not return a viral load reduction after 12 weeks, the chance of treatment success is less than 1%. Current indication for treatment includes patients with proven hepatitis C virus infection and persistent abnormal liver function tests. SVR of 75% or better occur in people with genotypes HCV 2 and 3 within 24 weeks of treatment, about 50% in those with genotype 1 within 48 weeks of treatment and 65° A for those with genotype 4 within 48 weeks of treatment. About 80% of hepatitis C patients in the United States exhibit genotype 1, whereas genotype 4 is more common in the Middle East and Africa.

Best results have been achieved with the combination of weekly subcutaneous injections of long-acting peginterferon alpha and oral ribavirin daily. Interferons are substances naturally released by cells in the body after viral invasion. Interferon alfa-2b and peginterferon alfa-2b are synthetic versions of these substances. The protein product is manufactured by recombinant DNA-technology. Second generation interferons are further derivatized by binding to inert polyethylene glycol, thereby altering the pharmacokinetic properties. Ribavirin is a nucleoside analogue, which disrupts viral replication of hepatitis C virus (HCV).

The most common side effects of HCV treatment with (pegylated) interferon include: a decrease in white blood cells and platelets, anemia, nausea, diarrhea, fever, chills, muscle and joint pain, difficulty in concentrating, thyroid dysfunction, hair loss, sleeplessness, irritability, mild to serious depression, and rarely, suicidal thoughts. Other serious adverse events include bone marrow toxicity, cardiovascular disorders, hypersensitivity, endocrine disorders, pulmonary disorders, colitis, pancreatitis, and opthalmologic disorders (eye and vision problems). (Pegylated) interferon may also cause or make worse fatal or life-threatening neuropsychiatric, autoimmune, ischemic, and infectious disorders. Patients with persistently severe or worsening signs or symptoms of these conditions are advised to stop therapy.

The most common side effect of HCV treatment with ribavirin is anemia, which can be treated with erythropoietin. Other side effects include mood swings, irritability, anxiety, insomnia, abdominal pain, nervousness, breathlessness, rash, hair loss, dry skin, nausea, diarrhea, loss of appetite, dizziness and weight loss. Ribavirin can also cause birth defects. Ribavirin should not be taken in combination with certain HIV drugs such as, but not limited to, didanosine, since lactic acidosis with fatal hepatic steatosis (fatty liver) may occur. Special attention should be taken for treatment with HIV co-infection.

Although the liver is the primary target of infection, studies to better define the steps of HCV infection are greatly hampered by the lack of a suitable animal model for such studies. The recent development of sub-genomic HCV RNA replicons capable of autonomous replication in the human hepatoma cell line, Huh-7, has been a significant advance in the study of HCV biology. The sub-genomic HCV RNA replicon system provides a cell-based assay to evaluate inhibitors of HCV enzymes like the protease, helicase, and RNA-dependant RNA polymerase or to evaluate nucleic acid targeting strategies like antisense RNA and ribozymes.

Targets for HCV Drug development include HCV-encoded enzymes, namely, NS2-3 and NS3-4A proteases, NS3 helicase, and NS5B RNA dependant RNA polymerase. Alternatively, HCV replication can be inhibited by blocking the conserved RNA elements employing a nucleic acid based approach including antisense oligonucleotides, ribozymes, RNA aptamers, RNA decoys, and RNA interference. A major drawback for such nucleic acid based approach is the size and charge of the nucleic acids, and their usually low physiological stability that do not allow for oral administration. Another target option for therapy is by blocking viral entry into the cell by obstruction of binding to HCV receptors such as, but not limited to, CD 209L and L-SIGN.

There is a strong need in the art to improve, or to provide alternatives to, the existing prophylactic or therapeutic solutions to viral infections, in particular infections by a virus of the Flaviridae family, more specifically HCV infection. In particular there is still a need in the art for providing alternative synthetic molecules having significant HCV replication inhibiting activity. There is also a need in the art for providing effective inhibiting molecules which are free from the significant drawbacks of the current drugs like pegylated interferon and ribavirin. Meeting these various needs in the art constitutes the main goal of the present invention.

SUMMARY OF THE INVENTION

The present invention is based on the unexpected finding of a medical utility in a class of novel 4,6-di- and 2,4,6-trisubstituted quinazoline derivatives represented by the structural formula (I)

wherein:

-   -   R₂ is selected from the group consisting of hydrogen; NR′R″;         C₁₋₇ alkyl optionally substituted with one or more substituents         independently selected from the group consisting of hydroxy,         halogen, C₁₋₇ alkoxy, C₃₋₁₀ cycloalkyl and heterocyclyl;         arylC₁₋₇ alkyl and C₃₋₁₀ cycloalkyl;     -   A is selected from the group consisting of a single bond, O,         S(O)_(n), C₁₋₇ alkylene, C₂₋₇ alkenylene and C₂₋₇ alkynylene;     -   n is 0, 1 or 2;

R₄ is selected from the group consisting of hydrogen; C₁₋₇ alkyl; C₂₋₇ alkenyl; C₃₋₁₀ cycloalkyl; C₃₋₁₀ cycloalkenyl; aryl; heterocyclyl; arylalkyl; heterocyclic-substituted C₁₋₇ alkyl and C₃₋₁₀ cycloalkyl-C₁₋₇ alkyl; wherein said R₄, when different from hydrogen, is optionally substituted with one or more R₇;

-   -   Y is selected from the group consisting of a single bond, C₁₋₇         alkylene, C₂₋₇ alkenylene and C₂₋₇ alkynylene;     -   R₆ is selected from the group consisting of halogen, heteroaryl         and aryl, wherein said heteroaryl or aryl is optionally         substituted with one or more R₈;     -   R₇ and R₈ are each independently selected from the group         consisting of halogen, nitro, hydroxyl, sulfhydryl,         hydroxylamino, cyano, amino, C₁₋₇ alkyl optionally substituted         with one or more halogen, C₂₋₇ alkenyl, C₂₋₇ alkynyl, C₁₋₇         alkoxy optionally substituted with one or more halogen, C₁₋₇         alkylthio, formyl, —CO—NHR₉, —CO—NR₉R₉′, —CS—NHR₉,         —NR₁₂—CO—NHR₁₂, —NR₁₂—CS—NHR₁₂, —SO₂NH₂, —NR₁₂—SO₂R₁₁,         —NR₁₂—COR₁₀, —NR₁₂—CSR₁₀, alkoxyamino, mercapto-amino,         thioalkylamino, alkylamino, alkenylamino, alkynylamino,         alkylsulfoxide, alkylsulfone, hydroxyalkyl-amino,         mercaptoalkylamino, hydrazino, alkylhydrazino, cycloalkyl, aryl,         aryloxy, carboxylic acid or esters or thioesters or halides or         anhydrides or amides thereof, thiocarboxylic acid or esters or         thioesters or halides or anhydrides or amides thereof, and         heterocyclyl optionally substituted with one or more         substituents independently selected from the group consisting of         hydroxy, oxo, halogen, amino, C₁₋₇ alkyl and C₁₋₇ alkoxy; and     -   R₉ and R₉′ are each independently selected from the group         consisting of hydrogen; C₃₋₁₀ cycloalkyl optionally substituted         with one more substituents independently selected from the group         consisting of cyano, halogen, hydroxy, amino, C₁₋₇ alkyl and         C₁₋₇alkoxy; C₁₋₇ alkoxy; C₁₋₇ alkyl optionally substituted with         one or more substituents independently selected from the group         consisting of amino, mono(C₁₋₇ alkyl)amino, cyano, di(C₁₋₇         alkyl)amino, halogen, and heterocyclyl optionally substituted         with C₁₋₇ alkyl; heterocyclyl optionally substituted with         C₁₋₇alkyl; aryl and aryl C₁₋₇ alkyl wherein the aryl moiety is         optionally substituted with one or more halogen; or R₉ and R₉′         together with the nitrogen atom to which they are attached form         a heterocyclyl group;     -   R₁₀ and R₁₁ are each independently selected from the group         consisting of C₁₋₇ alkyl optionally substituted with one or more         substituents independently selected from the group consisting of         amino, cyano, halogen and hydroxy; C₁₋₇ alkoxy optionally         substituted with one or more substituents independently selected         from the group consisting of amino, alkylamino, cyano,         dialkylamino, halogen, and heterocyclyl; heterocyclyl optionally         substituted with one or more substituents independently selected         from the group consisting of C₁₋₇ alkyl, acylamino and oxo;         C₃₋₁₀ cycloalkyl optionally substituted with one or more         substituents independently selected from the group consisting of         amino or hydroxy; and amino optionally substituted with one or         more substituents independently selected from the group         consisting of C₁₋₇ alkyl wherein said C₁₋₇ alkyl is optionally         substituted with one or more substituents independently selected         from the group consisting of amino, alkylamino, cyano,         dialkylamino, halogen and heterocyclyl;     -   each R₁₂ is selected from the group consisting of hydrogen and         C₁₋₇ alkyl, wherein said C₁₋₇ alkyl is optionally substituted         with one or more substituents independently selected from the         group consisting of cyano, halogen and hydroxy;     -   or Y is a single bond and R₆ is aryl substituted with one or         more substituents independently selected from the group         consisting of aryl, acyl, halo-C₁₋₇ alkoxy, hydroxy-C₁₋₇ alkyl,         di-(C₁₋₇ alkyl)amino C₁₋₇alkyl, ω-carboxy-alkanoylamino,         (O,O-dialkylphosphonyl)-C₁₋₇ alkyl;         mono-(C₃₋₇cycloalkyl)aminocarbonyl, di-(C₃₋₇         cycloalkyl)aminocarbonyl, mono-(C₁₋₇ alkyl)aminocarbonyl,         mono-(ω-dimethyl-amino-C₁₋₇ alkyl)aminocarbonyl, (di-C₁₋₇         alkyl)aminocarbonyl, mono-(hydroxy-C₁₋₇ alkyl)aminocarbonyl,         formylamino, —SO₂NH₂, arylamino-C₁₋₇ alkyl, C₁₋₇ alkylsulfonyl,         heterocyclyl-carbonyl, heterocyclyl-C₁₋₇ alkyl and heterocyclyl,         wherein said heterocyclyl is optionally substituted with C₃₋₇         alkenyloxycarbonyl, C₁₋₇ alkyl or C₁₋₇ alkyloxycarbonyl;     -   or Y is a single bond and R₆ is heterocyclyl substituted with         one or more substituents independently selected from the group         consisting of acylamino, C₁₋₇ alkylsulfonyl, arylsulfonyl,         heterocyclyl-C₁₋₇ alkyl, heterocyclyl-C₁₋₇ alkylamino, aryl and         heterocyclyl, wherein said heterocyclyl is optionally         substituted with C₁₋₇ alkyl, arylsulfonyl or (di-C₁₋₇         alkylamino)-C₁₋₇ alkoxy, or said heterocyclyl is non-aromatic         and includes a nitrogen atom substituted with heterocyclyl-C₁₋₇         alkyl or a carboxylic acid or a C₁₋₇ alkyl ester thereof;     -   R′ and R″ are each independently selected from the group         consisting of hydrogen, C₁₋₇ alkyl-carbonyl and C₁₋₇ alkyl,         wherein said C₁₋₇ alkyl is optionally substituted with one or         more groups independently selected from the group consisting of         hydroxy, halogen, C₁₋₇ alkoxy, heterocyclyl, arylC₁₋₇ alkyl and         C₃₋₁₀ cycloalkyl; or, one of R′ and R″ is hydrogen and the other         one of R′ and R″ is selected from the group consisting of         —CHR₁₃R₁₄ and R₁₅, wherein at least one of R₁₃ and R₁₄ is aryl         optionally substituted with one or more R₁₆, and the other one         of R₁₃ and R₁₄ is selected from the group consisting of         hydrogen, C₁₋₇ alkyl optionally substituted with one or more         substituents independently selected from the group consisting of         halogen and C₁₋₇ alkoxy, C₃₋₁₀ cycloalkyl, heterocyclyl and aryl         wherein said heterocyclyl or aryl is optionally substituted with         one or more R₁₆, and wherein R₁₅ is selected from the group         consisting of C₃₋₁₀ cycloalkyl, heteroaryl and aryl, wherein         said heteroaryl or aryl is optionally substituted with one or         more substituents independently selected from the group         consisting of halogen and C₁₋₇ alkyl, and wherein said C₃₋₁₀         cycloalkyl is optionally substituted, at the carbon position         adjacent to the nitrogen atom to which it is attached, with aryl         or heteroaryl wherein said aryl is optionally substituted with         halogen;     -   each R₁₆ is independently selected from the group consisting of         halogen, hydroxy, amino, nitro, cyano, halo C₁₋₇alkyl, halo         C₁₋₇alkoxy, C₁₋₇ alkyl, C₁₋₇ alkoxy, alkylamino, mono-C₁₋₇         alkylamino, carboxamido, —SO₂NH₂, carbamoyl, —NR₁₂—SO₂R₁₁ and         phenoxy,         and/or a pharmaceutically acceptable addition salt thereof         and/or a stereo-isomer thereof and/or a mono- or a di-N-oxide         thereof and/or a solvate thereof and/or a pro-drug form thereof,         provided that when R₂ is hydrogen and R₄ is selected from the         group consisting of C₃₋₁₀ cycloalkyl, aryl and heterocyclyl, R₇         is not C₃₋₁₀ cycloalkyl, aryl or heterocyclyl, and provided that         said quinazoline derivative is not         2-amino-4-ethoxy-6-(4-fluorophenyl)-quinazoline or         4-ethoxy-6-(4-fluorophenyl)-quinazoline.

Based on their biological properties, the present invention further relates to the use of these novel 4,6-di- and 2,4,6-trisubstituted quinazoline derivatives for the manufacture of medicaments, particularly for use in the treatment or prevention of viral infections and pathologic conditions associated therewith such as, but not limited to, especially infections due to Flaviridae. The present invention also relates to individual 4,6-di- and 2,4,6-trisubstituted quinazoline derivatives specifically disclosed herein, and their use in medicine. The present invention also relates to pharmaceutical compositions comprising said novel 4,6-di- and 2,4,6-trisubstituted quinazoline derivatives, optionally in synergistic combination with other drugs. The present invention also relates to various synthetic methods for making these novel 4,6-di- and 2,4,6-trisubstituted quinazoline derivatives, and salts thereof.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically shows a synthetic pathway for the synthesis of 2-amino-4,6-disubstituted quinazoline derivatives according to one embodiment of the present invention.

FIG. 2 schematically shows a synthetic pathway for the synthesis of 4,6-disubstituted quinazoline derivatives according to one embodiment of the present invention.

FIG. 3 schematically shows an alternative synthetic pathway for the synthesis of 2-amino-4,6-disubstituted quinazoline derivatives according to one embodiment of the present invention.

FIG. 4 schematically shows a synthetic pathway for the synthesis of 2-(substituted-amino)-4,6-disubstituted quinazoline derivatives according to one embodiment of the present invention.

FIG. 5 schematically shows a method for making 2,4,6-trisubstituted quinazoline derivatives according to one embodiment of the present invention bearing C-linked substituents on position 2.

FIG. 6 schematically shows another method for making 2,4,6-trisubstituted quinazoline derivatives according to one embodiment of the present invention.

FIG. 7 schematically shows another method for making 2,4,6-trisubstituted quinazoline derivatives according to one embodiment of the present invention bearing substituted amines at position 2.

DEFINITIONS

Unless otherwise stated herein, the term “tri-substituted” in relation to the quinazoline structure means that three of the carbon atoms being in positions 2, 4 and 6 of the quinazoline moiety (according to standard atom numbering for the quinazoline moiety) are substituted with an atom or group of atoms other than hydrogen. Unless otherwise stated herein, the term “di-substituted” in relation to the quinazoline structure means that two of the carbon atoms being in positions 4 and 6 of the quinazoline moiety (according to standard atom numbering for the quinazoline moiety) are substituted with an atom or group of atoms other than hydrogen.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “C₁₋₇ alkyl” means straight and branched chain saturated acyclic hydrocarbon monovalent radicals having from 1 to 7 carbon atoms such as, for example, methyl, ethyl, propyl, n-butyl, 1-methyl-ethyl (isopropyl), 2-methylpropyl (isobutyl), 1,1-dimethylethyl (tert-butyl), 2-methyl-butyl, n-pentyl, dimethylpropyl, n-hexyl, 2-methylpentyl, 3-methyl-pentyl, n-heptyl and the like. By analogy, the term “C₁₋₄ alkyl” refers to such radicals having from 1 to 4 carbon atoms, i.e. up to and including butyl.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “acyl” broadly refers to a substituent derived from an acid such as an organic monocarboxylic acid, a carbonic acid, a carbamic acid (resulting into a carbamoyl substituent) or the thioacid or imidic acid (resulting into a carbamidoyl substituent) corresponding to said acids, and the term “sulfonyl” refers to a substituent derived from an organic sulfonic acid, wherein said acids comprise an aliphatic, aromatic or heterocyclic group in the molecule. A more specific kind of “acyl” group within the scope of the above definition refers to a carbonyl (oxo) group adjacent to a C₁₋₇ alkyl, a C₃₋₁₀ cycloalkyl, an aryl, an arylalkyl or a heterocyclic group, all of them being such as herein defined. Suitable examples of acyl groups are to be found below.

Acyl and sulfonyl groups originating from aliphatic or cycloaliphatic monocarboxylic acids are designated herein as aliphatic or cycloaliphatic acyl and sulfonyl groups and include, but are not limited to, the following:

-   -   alkanoyl (for example formyl, acetyl, propionyl, butyryl,         isobutyryl, valeryl, isovaleryl, pivaloyl and the like);     -   cycloalkanoyl (for example cyclobutanecarbonyl,         cyclopentanecarbonyl, cyclo-hexanecarbonyl, 1-adamantanecarbonyl         and the like);     -   cycloalkyl-alkanoyl (for example cyclohexylacetyl,         cyclopentylacetyl and the like);     -   alkenoyl (for example acryloyl, methacryloyl, crotonoyl and the         like);     -   alkylthioalkanoyl (for example methylthioacetyl, ethylthioacetyl         and the like);     -   alkanesulfonyl (for example mesyl, ethanesulfonyl,         propanesulfonyl and the like);     -   alkoxycarbonyl (for example methoxycarbonyl, ethoxycarbonyl,         propoxycarbonyl, isopropoxycarbonyl, butoxycarbonyl,         isobutoxycarbonyl and the like);     -   alkylcarbamoyl (for example methylcarbamoyl and the like);     -   (N-alkyl)-thiocarbamoyl (for example (N-methyl)-thiocarbamoyl         and the like);     -   alkylcarbamidoyl (for example methylcarbamidoyl and the like);         and     -   alkoxyalkanoyl (for example methoxyalkanoyl, ethoxyalkanoyl,         propoxyalkanoyl and the like);

Acyl and sulfonyl groups may also originate from aromatic monocarboxylic acids and aromatic sulfonic acids, and include, but are not limited to, the following:

-   -   aroyl (for example benzoyl, toluoyl, xyloyl, 1-naphthoyl,         2-naphthoyl and the like);     -   arylalkanoyl (for example phenylacetyl and the like);     -   arylalkenoyl (for example cinnamoyl and the like);     -   aryloxyalkanoyl (for example phenoxyacetyl and the like);     -   arylthioalkanoyl (for example phenylthioacetyl and the like);     -   arylaminoalkanoyl (for example N-phenylglycyl, and the like);     -   arylsulfonyl (for example benzenesulfonyl, toluenesulfonyl,         naphthalene sulfonyl and the like);     -   aryloxycarbonyl (for example phenoxycarbonyl,         naphthyloxycarbonyl and the like);     -   arylalkoxycarbonyl (for example benzyloxycarbonyl and the like);     -   arylcarbamoyl (for example phenylcarbamoyl, naphthylcarbamoyl         and the like);     -   arylglyoxyloyl (for example phenylglyoxyloyl and the like).     -   arylthiocarbamoyl (for example phenylthiocarbamoyl and the         like); and     -   arylcarbamidoyl (for example phenylcarbamidoyl and the like).

Acyl groups may also originate from an heterocyclic monocarboxylic acids and include, but are not limited to, the following:

-   -   heterocyclic-carbonyl, in which said heterocyclic group is as         defined herein, preferably an aromatic or non-aromatic 5- to         7-membered heterocyclic ring with one or more heteroatoms         selected from the group consisting of nitrogen, oxygen and         sulfur in said ring (for example thiophenoyl, furoyl,         pyrrolecarbonyl, nicotinoyl and the like); and     -   heterocyclic-alkanoyl in which said heterocyclic group is as         defined herein, preferably an aromatic or non-aromatic 5- to         7-membered heterocyclic ring with one or more heteroatoms         selected from the group consisting of nitrogen, oxygen and         sulfur in said ring (for example thiopheneneacetyl, furylacetyl,         imidazolylpropionyl, tetrazolylacetyl,         2-(2-amino-4-thiazolyl)-2-methoxyiminoacetyl and the like).

As used herein with respect to a substituting radical, and unless otherwise stated, the term “C₁₋₇ alkylene” means the divalent hydrocarbon radical corresponding to the above defined C₁₋₇ alkyl, such as methylene, bis(methylene), tris(methylene), tetramethylene, hexamethylene and the like.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “cycloalkyl” means a mono- or polycyclic saturated hydrocarbon monovalent radical having from 3 to 10 carbon atoms, such as for instance cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl and the like, or a C₇₋₁₀ polycyclic saturated hydrocarbon monovalent radical having from 7 to 10 carbon atoms such as, for instance, norbornyl, fenchyl, trimethyltricycloheptyl or adamantyl.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “cycloalkyl-alkyl” refers to an aliphatic saturated hydrocarbon monovalent radical (preferably a C₁₋₇ alkyl such as defined above) to which a C₃₋₁₀ cycloalkyl (such as defined above) is already linked such as, but not limited to, cyclohexylmethyl, cyclopentylmethyl and the like.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “C₃₋₁₀ cycloalkylene” means the divalent hydrocarbon radical corresponding to the above defined C₃₋₁₀ cycloalkyl.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “aryl” designates any mono- or polycyclic aromatic monovalent hydrocarbon radical having from 6 up to 30 carbon atoms such as but not limited to phenyl, naphthyl, anthracenyl, phenantracyl, fluoranthenyl, chrysenyl, pyrenyl, biphenylyl, terphenyl, picenyl, indenyl, biphenyl, indacenyl, benzocyclobutenyl, benzocyclooctenyl and the like, including fused benzo-C₄₋₈ cycloalkyl radicals (the latter being as defined above) such as, for instance, indanyl, tetrahydronaphthyl, fluorenyl and the like, all of the said radicals being optionally substituted with one or more substituents independently selected from the group consisting of halogen, amino, trifluoromethyl, hydroxyl, sulfhydryl and nitro, such as for instance 4-fluorophenyl, 4-chlorophenyl, 3,4-dichlorophenyl, 4-cyanophenyl, 2,6-dichlorophenyl, 2-fluorophenyl, 3-chlorophenyl, 3,5-dichlorophenyl and the like.

As used herein, e.g. with respect to a substituting radical such as the combination of substituents in certain positions of the quinazoline ring together with the carbon atoms in the same positions of said ring, and unless otherwise stated, the term “homocyclic” means a mono- or polycyclic, saturated or mono-unsaturated or polyunsaturated hydrocarbon radical having from 4 up to 15 carbon atoms but including no heteroatom in the said ring; for instance said combination of substituents may form a C₂₋₆ alkylene radical, such as tetramethylene, which cyclizes with the carbon atoms in certain positions of the quinazoline ring.

As used herein with respect to a substituting radical (including the combination of substituents in certain positions of the quinazoline ring together with the carbon atoms in the same positions of said ring), and unless otherwise stated, the terms “heterocyclic” and “heterocyclyl” mean a mono- or polycyclic, saturated or mono-unsaturated or polyunsaturated monovalent hydrocarbon radical having from 2 up to 15 carbon atoms and including one or more heteroatoms in one or more heterocyclic rings, each of said rings having from 3 to 10 atoms (and optionally further including one or more heteroatoms attached to one or more carbon atoms of said ring, for instance in the form of a carbonyl or thiocarbonyl or selenocarbonyl group, and/or to one or more heteroatoms of said ring, for instance in the form of a sulfone, sulfoxide, N-oxide, phosphate, phosphonate or selenium oxide group), each of said heteroatoms being independently selected from the group consisting of nitrogen, oxygen, sulfur, selenium and phosphorus, also including radicals wherein a heterocyclic ring is fused to one or more aromatic hydrocarbon rings for instance in the form of benzo-fused, dibenzo-fused and naphtho-fused heterocyclic radicals; within this definition are included heterocyclic radicals such as, but not limited to, diazepinyl, oxadiazinyl, thiadiazinyl, dithiazinyl, triazolonyl, diazepinonyl, triazepinyl, triazepinonyl, tetrazepinonyl, benzoquinolinyl, benzothiazinyl, benzothiazinonyl, benzoxa-thiinyl, benzodioxinyl, benzodithiinyl, benzoxazepinyl, benzothiazepinyl, benzodiazepinyl, benzodioxepinyl, benzodithiepinyl, benzoxazocinyl, benzothiazocinyl, benzodiazocinyl, benzoxathiocinyl, benzodioxocinyl, benzotrioxepinyl, benzoxathiazepinyl, benzoxa-diazepinyl, benzothia-diazepinyl, benzotriazepinyl, benzoxathiepinyl, benzotriazinonyl, benzoxazolinonyl, azetidinonyl, azaspiroundecyl, dithiaspirodecyl, selenazinyl, selen-azolyl, selenophenyl, hypoxanthinyl, azahypoxanthinyl, bipyrazinyl, bipyridinyl, oxazoli-dinyl, diselenopyrimidinyl, benzodioxocinyl, benzopyrenyl, benzopyranonyl, benzo-phenazinyl, benzoquinolizinyl, dibenzocarbazolyl, dibenzoacridinyl, dibenzophenazinyl, dibenzothiepinyl, dibenzoxepinyl, dibenzopyranonyl, dibenzoquinoxalinyl, dibenzo-thiazepinyl, dibenzisoquinolinyl, tetraazaadamantyl, thiatetraazaadamantyl, oxauracil, oxazinyl, dibenzothiophenyl, dibenzofuranyl, oxazolinyl, oxazolonyl, azaindolyl, azolonyl, thiazolinyl, thiazolonyl, thiazolidinyl, thiazanyl, pyrimidonyl, thiopyrimidonyl, thia-morpholinyl, aziactonyl, naphthindazolyi, naphthindolyl, naphthothiazolyl, naphthothioxolyl, naphthoxindolyl, naphthotriazolyl, naphthopyranyl, oxabicycloheptyl, azabenzimidazolyl, azacycloheptyl, azacyclooctyl, azacyclononyl, azabicyclononyl, tetrahydrofuryl, tetrahydropyranyl, tetrahydro-pyronyl, tetrahydroquinoleinyl, tetrahydrothienyl and dioxide thereof, dihydrothienyl dioxide, dioxindolyl, dioxinyl, dioxenyl, dioxazinyl, thioxanyl, thioxolyl, thiourazolyl, thiotriazolyl, thiopyranyl, thiopyronyl, coumarinyl, quinoleinyl, oxyquinoleinyl, quinuclidinyl, xanthinyl, dihydropyranyl, benzodihydrofuryl, benzothio-pyronyl, benzothiopyranyl, benzoxazinyl, benzoxazolyl, benzodioxolyl, benzodioxanyl, benzothiadiazolyl, benzotriazinyl, benzothiazolyl, benzoxazolyl, phenothioxinyl, pheno-thiazolyl, phenothienyl (benzothiofuranyl), phenopyronyl, phenoxazolyl, pyridinyl, dihydropyridinyl, tetrahydropyridinyl, piperidinyl, morpholinyl, thiomorpholinyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, tetrazinyl, triazolyl, benzotriazolyl, tetrazolyl, imidazolyl, pyrazolyl, thiazolyl, thiadiazolyl, isothiazolyl, oxazolyl, oxadiazolyl, pyrrolyl, furyl, dihydrofuryl, furoyl, hydantoinyl, dioxolanyl, dioxolyl, dithianyl, dithienyl, dithiinyl, thienyl, indolyl, indazolyl, benzofuryl, quinolyl, quinazolinyl, quinoxalinyl, carbazolyl, phenoxazinyl, phenothiazinyl, xanthenyl, purinyl, benzothienyl, naphthothienyl, thianthrenyl, pyranyl, pyronyl, benzopyronyl, isobenzofuranyl, chromenyl, phenoxathiinyl, indolizinyl, quino-lizinyl, isoquinolyl, phthalazinyl, naphthiridinyl, cinnolinyl, pteridinyl, carbolinyl, acridinyl, perimidinyl, phenanthrolinyl, phenazinyl, phenothiazinyl, imidazolinyl, imidazolidinyl, benzimidazolyl, pyrazolinyl, pyrazolidinyl, pyrrolinyl, pyrrolidinyl, piperazinyl, uridinyl, thymidinyl, cytidinyl, azirinyl, aziridinyl, diazirinyl, diaziridinyl, oxiranyl, oxaziridinyl, dioxiranyl, thiiranyl, azetyl, dihydroazetyl, azetidinyl, oxetyl, oxetanyl, oxetanonyl, homopiperazinyl, homopiperidinyl, thietyl, thietanyl, diazabicyclooctyl, diazetyl, diaziri-dinonyl, diaziridinethionyl, chromanyl, chromanonyl, thiochromanyl, thiochromanonyl, thiochromenyl, benzofuranyl, benzisothiazolyl, benzocarbazolyl, benzochromonyl, benz-isoalloxazinyl, benzocoumarinyl, thiocoumarinyl, phenometoxazinyl, phenoparoxazinyl, phentriazinyl, thiodiazinyl, thiodiazolyl, indoxyl, thioindoxyl, benzodiazinyl (e.g. phthalazinyl), phthalidyl, phthalimidinyl, phthalazonyl, alloxazinyl, dibenzopyronyl (i.e. xanthonyl), xanthionyl, isatyl, isopyrazolyl, isopyrazolonyl, urazolyl, urazinyl, uretinyl, uretidinyl, succinyl, succinimido, benzylsultimyl, benzylsultamyl and the like, including all possible isomeric forms thereof, wherein each carbon atom of said heterocyclic ring may furthermore be independently substituted with a substituent selected from the group consisting of halogen, nitro, C₁₋₇ alkyl (optionally containing one or more functions or radicals selected from the group consisting of carbonyl (oxo), alcohol (hydroxyl), ether (alkoxy), acetal, amino, imino, oximino, alkyloximino, amino-acid, cyano, carboxylic acid ester or amide, nitro, thio C₁₋₇ alkyl, thio C₃₋₁₀ cycloalkyl, C₁₋₇ alkylamino, cycloalkylamino, alkenylamino, cycloalkenylamino, alkynylamino, arylamino, arylalkylamino, hydroxy-alkylamino, mercaptoalkylamino, heterocyclic-substituted alkylamino, heterocyclic amino, heterocyclic-substituted arylamino, hydrazino, alkylhydrazino, phenylhydrazino, sulfonyl, sulfonamido and halogen), C₃₋₇ alkenyl, C₂₋₇ alkynyl, halo C₁₋₇ alkyl, C₃₋₁₀ cycloalkyl, aryl, arylalkyl, alkylaryl, alkylacyl, arylacyl, hydroxyl, amino, C₁₋₇ alkylamino, cycloalkylamino, alkenylamino, cycloalkenylamino, alkynylamino, arylamino, arylalkylamino, hydroxy-alkylamino, mercaptoalkylamino, heterocyclic-substituted alkylamino, heterocyclic amino, heterocyclic-substituted arylamino, hydrazino, alkylhydrazino, phenylhydrazino, sulfhydryl, C₁₋₇ alkoxy, C₃₋₁₀ cycloalkoxy, aryloxy, arylalkyloxy, oxyheterocyclic, heterocyclic-substituted alkyloxy, thio C₁₋₇ alkyl, thio C₃₋₁₀ cycloalkyl, thioaryl, thioheterocyclic, arylalkylthio, heterocyclic-substituted alkylthio, formyl, hydroxylamino, cyano, carboxylic acid or esters or thioesters or amides thereof, thiocarboxylic acid or esters or thioesters or amides thereof; depending upon the number of unsaturations in the 3 to 10 atoms ring, heterocyclic radicals may be sub-divided into heteroaromatic (or “heteroaryl”) radicals and non-aromatic heterocyclic radicals; when a heteroatom of said non-aromatic heterocyclic radical is nitrogen, the latter may be substituted with a substituent selected from the group consisting of C₁₋₇ alkyl, C₃₋₁₀ cycloalkyl, aryl, arylalkyl and alkylaryl.

As used herein with respect to a substituting radical, and unless otherwise stated, the terms “C₁₋₇ alkoxy”, “C₃₋₁₀ cycloalkoxy”, “aryloxy”, “arylalkoxy”, “oxyheterocyclic”, “heterocyclic-substituted alkoxy”, “thio C₁₋₇ alkyl”, “thio C₃₋₁₀ cycloalkyl”, “arylthio”, “arylalkylthio” and “thioheterocyclic” refer to substituents wherein a carbon atom of a C₁₋₇ alkyl, respectively a C₃₋₁₀ cycloalkyl, aryl, arylalkyl, heterocyclic radical or heterocyclic-substituted alkyl (each of them such as defined herein), is attached to an oxygen atom or a divalent sulfur atom through a single bond such as, but not limited to, methoxy, ethoxy, propoxy, butoxy, pentoxy, isopropoxy, sec-butoxy, tert-butoxy, isopentoxy, cyclopropyloxy, cyclobutyloxy, cyclopentyloxy, thiomethyl, thioethyl, thiopropyl, thiobutyl, thiopentyl, thiocyclopropyl, thiocyclobutyl, thiocyclopentyl, thiophenyl, phenyloxy, benzyloxy, mercaptobenzyl and cresoxy, and various isomers of piperidinoxy, 1-methylpiperidinoxy, pyrrolidinoxy, pyridinoxy, tetrahydrofuranyloxy, morpholinoethoxy, piperazinoethoxy, piperidinoethoxy, pyridinoethoxy, pyrrolidinoethoxy, piperidinomethoxy, methylpyridinoxy, methylquinolinoxy, pyridinopropoxy and the like.

As used herein with respect to a substituting atom, and unless otherwise stated, the term halogen means any atom selected from the group consisting of fluorine, chlorine, bromine and iodine.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “halo C₁₋₇ alkyl” means a C₁₋₇ alkyl radical (such as above defined) in which one or more hydrogen atoms are independently replaced by one or more halogens (preferably fluorine, chlorine or bromine), such as but not limited to difluoromethyl, trifluoromethyl, trifluoroethyl, octafluoropentyl, dodecafluoroheptyl, dichloromethyl and the like.

As used herein with respect to a substituting radical, and unless otherwise stated, the terms “C₂₋₇ alkenyl” designate a straight and branched acyclic hydrocarbon monovalent radical having one or more ethylenic unsaturations and having from 2 to 7 carbon atoms such as, for example, vinyl, 1-propenyl, 2-propenyl (allyl), 1-butenyl, 2-butenyl, 2-pentenyl, 3-pentenyl, 3-methyl-2-butenyl, 3-hexenyl, 2-hexenyl, 2-heptenyl, 1,3-butadienyl, pentadienyl, hexadienyl, heptadienyl, heptatrienyl and the like, including all possible isomers thereof.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “C₃₋₁₀ cycloalkenyl” means a monocyclic mono- or polyunsaturated hydrocarbon monovalent radical having from 3 to 8 carbon atoms, such as for instance cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cyclohexadienyl, cycloheptenyl, cyclohepta-dienyl, cycloheptatrienyl, cyclooctenyl, cyclooctadienyl and the like, or a C₇₋₁₀ polycyclic mono- or polyunsaturated hydrocarbon mono-valent radical having from 7 to 10 carbon atoms such as dicyclopentadienyl, fenchenyl (including all isomers thereof, such as α-pinolenyl), bicyclo[2.2.1]hept-2-enyl, bicyclo[2.2.1]hepta-2,5-dienyl, cyclo-fenchenyl and the like.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “C₂₋₇ alkynyl” defines straight and branched chain hydrocarbon radicals containing one or more triple bonds and optionally at least one double bond and having from 2 to 7 carbon atoms such as, for example, acetylenyl, 1-propynyl, 2-propynyl, 1-butynyl, 2-butynyl, 2-pentynyl, 1-pentynyl, 3-methyl-2-butynyl, 3-hexynyl, 2-hexynyl, 1-penten-4-ynyl, 3-penten-1-ynyl, 1,3-hexadien-1-ynyl and the like.

As used herein with respect to a substituting radical, and unless otherwise stated, the terms “arylalkyl”, “arylalkenyl” and “heterocyclic-substituted alkyl” refer to an aliphatic saturated or ethylenically unsaturated hydrocarbon monovalent radical (preferably a C₁₋₇ alkyl or C₂₋₇ alkenyl radical such as defined above) onto which an aryl or heterocyclic radical (such as defined above) is already bonded via a carbon atom, and wherein the said aliphatic radical and/or the said aryl or heterocyclic radical may be optionally substituted with one or more substituents independently selected from the group consisting of halogen, amino, hydroxyl, sulfhydryl, C₁₋₇ alkyl, C₁₋₇ alkoxy, trifluoromethyl and nitro, such as but not limited to benzyl, 4-chlorobenzyl, 4-fluorobenzyl, 2-fluorobenzyl, 3,4-dichlorobenzyl, 2,6-dichlorobenzyl, 3-methylbenzyl, 4-methylbenzyl, 4-tentbutylbenzyl, phenylpropyl, 1-naphthylmethyl, phenylethyl, 1-amino-2-phenylethyl, 1-amino-2-[4-hydroxy-phenyl]ethyl, 1-amino-2-[indol-2-yl]ethyl, styryl, pyridylmethyl (including all isomers thereof), pyridylethyl, 2-(2-pyridyl)isopropyl, oxazolylbutyl, 2-thienyl-methyl, pyrrolylethyl, morpholinylethyl, imidazol-1-yl-ethyl, benzodioxolylmethyl and 2-furylmethyl.

As used herein with respect to a substituting radical, and unless otherwise stated, the terms “alkylaryl” and “alkyl-substituted heterocyclic” refer to an aryl or, respectively, heterocyclic radical (such as defined above) onto which are bonded one or more aliphatic saturated or unsaturated hydrocarbon monovalent radicals, preferably one or more C₁₋₇ alkyl, C₂₋₇ alkenyl or C₃₋₁₀ cycloalkyl radicals as defined above such as, but not limited to, o-toluoyl, m-toluoyl, p-toluoyl, 2,3-xylyl, 2,4-xylyl, 3,4-xylyl, o-cumenyl, m-cumenyl, p-cumenyl, o-cymenyl, m-cymenyl, p-cymenyl, mesityl, tert-butylphenyl, lutidinyl (i.e. dimethylpyridyl), 2-methylaziridinyl, methyl-benzimidazolyl, methylbenzofuranyl, methylbenzothiazolyl, methylbenzotriazolyl, methylbenzoxazolyl and methylbenzselenazolyl.

As used herein with respect to a substituting radical, and unless otherwise stated, the term “alkoxyaryl” refers to an aryl radical (such as defined above) onto which is (are) bonded one or more C₁₋₇ alkoxy radicals as defined above, preferably one or more methoxy radicals, such as, but not limited to, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 3,4-dimethoxyphenyl, 2,4,6-trimethoxyphenyl, methoxynaphthyl and the like.

As used herein with respect to a substituting radical, and unless otherwise stated, the terms “alkylamino”, “cycloalkylamino”, “alkenylamino”, “cycloalkenylamino”, “arylamino”, “arylalkylamino”, “heterocyclic-substituted alkyl-amino”, “heterocyclic-substituted arylamino”, “heterocyclic amino”, “hydroxy-alkylamino”, “mercaptoalkylamino” and “alkynylamino” mean that respectively one (thus monosubstituted amino) or even two (thus disubstituted amino) C₁₋₇ alkyl, C₃₋₁₀ cycloalkyl, C₂₋₇ alkenyl, C₃₋₁₀ cycloalkenyl, aryl, arylalkyl, heterocyclic-substituted alkyl, heterocyclic-substituted aryl, heterocyclic (provided in this case the nitrogen atom is attached to a carbon atom of the heterocyclic ring), mono- or polyhydroxy C₁₋₇ alkyl, mono- or polymercapto C₁₋₇ alkyl, or C₂₋₇ alkynyl radical(s) (each of them as defined herein, respectively, and including the presence of optional substituents independently selected from the group consisting of halogen, amino, hydroxyl, sulfhydryl, C₁₋₇ alkyl, C₁₋₇ alkoxy, trifluoromethyl and nitro) is/are attached to a nitrogen atom through a single bond such as, but not limited to, anilino, 2-bromoanilino, 4-bromoanilino, 2-chloroanilino, 3-chloroanilino, 4-chloroanilino, 3-chloro-4-methoxyanilino, 5-chloro-2-methoxyanilino, 2,3-dimethylanilino, 2,4-dimethylanilino, 2,5-dimethylanilino, 2,6-dimethylanilino, 3,4-dimethylanilino, 2-fluoroanilino, 3-fluoroanilino, 4-fluoroanilino, 3-fluoro-2-methoxyanilino, 3-fluoro-4-methoxyanilino, 2-fluoro-4-methylanilino, 2-fluoro-5-methylanilino, 3-fluoro-2-methyl-anilino, 3-fluoro-4-methylanilino, 4-fluoro-2-methylanilino, 5-fluoro-2-methylanilino, 2-iodoanilino, 3-iodoanilino, 4-iodoanilino, 2-methoxy-5-methylanilino, 4-methoxy-2-methyl-anilino, 5-methoxy-2-methylanilino, 2-ethoxyanilino, 3-ethoxy-anilino, 4-ethoxyanilino, benzylamino, 2-methoxybenzylamino, 3-methoxybenzyl-amino, 4-methoxybenzylamino, 2-fluorobenzylamino, 3-fluorobenzylamino, 4-fluoro-benzylamino, 2-chlorobenzylamino, 3-chlorobenzylamino, 4-chlorobenzylamino, 2-aminobenzylamino, diphenylmethylamino, α-naphthylamino, methylamino, dimethylamino, ethylamino, diethylamino, isopropylamino, propenylamino, n-butylamino, tert-butylamino, dibutylamino, 1,2-diaminopropyl, 1,3-diaminopropyl, 1,4-diaminobutyl, 1,5-diaminopentyl, 1,6-diaminohexyl, morpholino-methylamino, 4-morpholinoanilino, hydroxymethylamino, β-hydroxyethylamino and ethynylamino; this definition also includes mixed disubstituted amino radicals wherein the nitrogen atom is attached to two such radicals belonging to two different sub-sets of radicals, e.g. an alkyl radical and an alkenyl radical, or to two different radicals within the same sub-set of radicals, e.g. methylethylamino; among di-substituted amino radicals, symmetrically-substituted amino radicals are more easily accessible and thus usually preferred from a standpoint of ease of preparation.

As used herein with respect to a substituting radical, and unless otherwise stated, the terms “(thio)carboxylic acid ester”, “(thio)carboxylic acid thioester” and “(thio)-carboxylic acid amide” refer to radicals wherein the carboxyl or thiocarboxyl group is bonded to the hydrocarbonyl residue of an alcohol, a thiol, a polyol, a phenol, a thiophenol, a primary or secondary amine, a polyamine, an amino-alcohol or ammonia, the said hydrocarbonyl residue being selected from the group consisting of alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aryl, arylalkyl, alkylaryl, alkylamino, cycloalkylamino, alkenylamino, cycloalkenylamino, arylamino, arylalkylamino, heterocyclic-substituted alkylamino, heterocyclic amino, heterocyclic-substituted arylamino, hydroxyalkylamino, mercapto-alkylamino or alkynylamino (such as above defined, respectively).

As used herein with respect to a substituting radical, and unless otherwise stated, the term “amino-acid” refers to a radical derived from a molecule having the chemical formula H₂N—CHR—COOH, wherein R is the side group of atoms characterising the amino-acid type; said molecule may be one of the 20 naturally-occurring amino-acids or any similar non naturally-occurring amino-acid.

As used herein and unless otherwise stated, the term “stereoisomer” refers to all possible different isomeric as well as conformational forms which the compounds of formula (I) may possess, in particular all possible stereochemically and conformationally isomeric forms, all diastereomers, enantiomers and/or conformers of the basic molecular structure. Some compounds of the present invention may exist in different tautomeric forms, all of the latter being included within the scope of the present invention.

As used herein and unless otherwise stated, the term “enantiomer” means each individual optically active form of a compound of the invention, having an optical purity or enantiomeric excess (as determined by methods standard in the art) of at least 80% (i.e. at least 90% of one enantiomer and at most 10% of the other enantiomer), preferably at least 90% and more preferably at least 98%.

As used herein and unless otherwise stated, the term “solvate” includes any combination which may be formed by a quinazoline derivative of this invention with a suitable inorganic solvent (e.g. hydrates) or organic solvent, such as but not limited to alcohols, ketones, esters, ethers, nitriles and the like.

DETAILED DESCRIPTION OF THE INVENTION

In one aspect, the present invention relates to a class of novel disubstituted and trisubstituted quinazoline derivatives represented by the structural formula (I):

wherein,

-   -   R₂ is selected from the group consisting of hydrogen; NR′R″;         C₁₋₇ alkyl optionally substituted with one or more groups         selected from the group consisting of hydroxy, halogen, C₁₋₇         alkoxy, C₃₋₁₀ cycloalkyl and heterocyclyl; arylC₁₋₇ alkyl and         C₃₋₁₀ cycloalkyl;     -   A is selected from the group consisting of a single bond, O,         S(O)_(n), C₁₋₇ alkylene, C₂₋₇alkenylene (in particular —C═C—)         and C₂₋₇alkynylene (in particular —C≡C—);     -   n is 0, 1 or 2;     -   R₄ is selected from the group consisting of hydrogen, C₁₋₇         alkyl; C₂₋₇ alkenyl; C₃₋₁₀ cycloalkyl; C₃₋₁₀ cycloalkenyl; aryl;         heterocyclyl; arylalkyl; heterocyclic-substituted C₁₋₇ alkyl and         C₃₋₁₀ cycloalkyl-C₁₋₇ alkyl; and wherein said R₄ is optionally         substituted with one or more R₇;     -   Y is selected from the group consisting of a single bond, C₁₋₇         alkylene, C₂₋₇ alkenylene (in particular —C═C—) and C₂₋₇         alkynylene (in particular —C≡C—);     -   R₆ is selected from the group consisting of halogen, heteroaryl         and aryl, wherein said heteroaryl or aryl is optionally         substituted with one or more R₈;     -   R₇ and R₈ are each independently selected from the group         consisting of halogen, nitro, hydroxyl, sulfhydryl,         hydroxylamino, cyano, amino, C₁₋₇ alkyl optionally substituted         with one or more halogen, C₂₋₇ alkenyl, C₂₋₇ alkynyl, C₁₋₇         alkoxy optionally substituted with one or more halogen, C₁₋₇         alkylthio, formyl, —CO—NHR₉,         -   —CO—NR₉R₉′, —CS—NHR₉, —NR₁₂—CO—NHR₁₂, —NR₁₂—CS—NHR₁₂,             —SO₂NH₂, —NR₁₂—SO₂R₁₁, —NR₁₂—COR₁₀, —NR₁₂—CSR₁₀,             alkoxyamino, mercapto-amino, thioalkylamino, alkylamino,             alkenylamino, alkynylamino, alkylsulfoxide, alkylsulfone,             hydroxyalkyl-amino, mercaptoalkylamino, hydrazino,             alkylhydrazino, cycloalkyl, aryl, aryloxy, carboxylic acid             or esters or thioesters or halides or anhydrides or amides             thereof, thiocarboxylic acid or esters or thioesters or             halides or anhydrides or amides thereof, and heterocyclyl             optionally substituted with one or more substituents             independently selected from the group consisting of hydroxy,             oxo, halogen, amino, C₁₋₇ alkyl and C₁₋₇ alkoxy; and     -   R₉ and R₉′ are each independently selected from the group         consisting of hydrogen, C₃₋₁₀ cycloalkyl optionally substituted         with one more substituents independently selected from the group         consisting of cyano, halogen, hydroxy, amino, C₁₋₇ alkyl and         C₁₋₇ alkoxy; C₁₋₇ alkoxy; C₁₋₇ alkyl optionally substituted with         one or more substituents independently selected from the group         consisting of amino alkyl-amino, cyano, dialkylamino, halogen,         and heterocyclyl optionally substituted with C₁₋₇alkyl;         heterocyclyl optionally substituted with C₁₋₇ alkyl; aryl and         arylC₁₋₇ alkyl wherein the aryl moiety is optionally substituted         with one or more halogens; or R₉ and R₉′ together with the         nitrogen atom to which they are attached form a heterocycyl         group;     -   R₁₀ and R₁₁ are each independently selected from the group         consisting of C₁₋₇ alkyl optionally substituted with one or more         substituents independently selected from the group consisting of         amino, cyano, halogen and hydroxy; C₁₋₇ alkoxy optionally         substituted with one or more substituents independently selected         from the group consisting of amino, alkylamino, cyano,         dialkylamino, halogen, and heterocyclyl; heterocyclyl optionally         substituted with one or more substituents independently selected         from the group consisting of C₁₋₇ alkyl, acylamino and oxo;         C₃₋₁₀ cycloalkyl optionally substituted with one or more         substituents independently selected from the group consisting of         amino or hydroxy; and amino optionally substituted with one or         more substituents independently selected from the group         consisting of C₁₋₇ alkyl wherein said C₁₋₇ alkyl is optionally         substituted with one or more substituents independently selected         from the group consisting of amino, alkylamino, cyano,         dialkylamino, halogen and heterocyclyl;     -   each R₁₂ is selected from the group consisting of hydrogen and         C₁₋₇ alkyl, wherein said C₁₋₇ alkyl is optionally substituted         with one or more substituents independently selected from the         group consisting of cyano, halogen and hydroxy;     -   or —Y—R₆ is aryl substituted with one or more substituents         independently selected from the group consisting of aryl, acyl,         halo-C₁₋₇ alkoxy, hydroxy-C₁₋₇ alkyl, di-(C₁₋₇alkyl)amino         C₁₋₇alkyl, ω-carboxy-alkanoylamino, (O,O-dialkylphosphonyl)-C₁₋₇         alkyl; mono-(C₃₋₇ cycloalkyl)aminocarbonyl, di-(C₃₋₇         cycloalkyl)aminocarbonyl, mono-(C₁₋₇ alkyl)aminocarbonyl,         mono-(ω-dimethylamino-C₁₋₇ alkyl)aminocarbonyl, (di-C₁₋₇         alkyl)aminocarbonyl, mono-(hydroxy-C₁₋₇ alkyl)aminocarbonyl,         formyl-amino, —SO₂NH₂, arylamino-C₁₋₇ alkyl, C₁₋₇ alkylsulfonyl,         heterocyclyl-carbonyl, heterocyclyl-C₁₋₇ alkyl and heterocyclyl,         wherein said heterocyclyl is optionally substituted with C₃₋₇         alkenyloxycarbonyl, C₁₋₇ alkyl or C₁₋₇ alkyloxycarbonyl;     -   or —Y—R₆ is heterocyclyl substituted with one or more         substituents independently selected from the group consisting of         acylamino, alkylsulfonyl, arylsulfonyl, heterocyclyl-C₁₋₄ alkyl,         heterocyclyl-C₁₋₇ alkylamino, aryl and heterocyclyl, wherein         said heterocyclyl is optionally substituted with C₁₋₇ alkyl,         arylsulfonyl or (di-C₁₋₇ alkylamino)-C₁₋₇ alkoxy, or said         heterocyclyl is non-aromatic and includes a nitrogen atom         substituted with heterocyclyl-C₁₋₇ alkyl or a carboxylic acid or         a C₁₋₇ alkyl ester thereof,     -   R′ and R″ are each independently selected from the group         consisting of hydrogen, C₁₋₇ alkyl-carbonyl and C₁₋₇ alkyl,         wherein said C₁₋₇ alkyl is optionally substituted with one or         more groups independently selected from the group consisting of         hydroxy, halogen, C₁₋₇ alkoxy, heterocyclyl, arylC₁₋₇ alkyl and         C₃₋₁₀ cycloalkyl; or, one of R′ and R″ is hydrogen and the other         one of R′ and R″ is selected from the group consisting of         —CHR₁₃R₁₄ and R₁₅, wherein at least one of R₁₃ and R₁₄ is aryl         optionally substituted with one or more R₁₆, and the other one         of R₁₃ and R₁₄ is selected from the group consisting of         hydrogen, C₁₋₇alkyl optionally substituted with one or more         substituents independently selected from the group consisting of         halogen and C₁₋₇alkoxy, C₃₋₁₀cycloalkyl, heterocyclyl and aryl         wherein said heterocyclyl or aryl are optionally substituted         with one or more R₁₆, and wherein R₁₅ is selected from the group         consisting of C₃₋₁₀ cycloalkyl, heteroaryl and aryl, wherein         said heteroaryl or aryl is optionally substituted with one or         more substituents independently selected from the group         consisting of halogen and C₁₋₇ alkyl, and wherein said C₃₋₁₀         cycloalkyl is optionally substituted at the carbon position         adjacent to the nitrogen atom to which it is attached with aryl         or heteroaryl wherein said aryl is optionally substituted with         halogen;     -   each R₁₆ is independently selected from the group consisting of         halogen, hydroxy, amino, nitro, cyano, halo C₁₋₇alkyl, halo         C₁₋₇alkoxy, C₁₋₇ alkyl, C₁₋₇ alkoxy, alkylamino, mono-C₁₋₇         alkylamino, carboxamido, —SO₂NH₂, carbamoyl, —NR₁₂—SO₂R₁₁ and         phenoxy,         and/or a pharmaceutically acceptable addition salt thereof         and/or a stereo-isomer thereof and/or a mono- or a di-N-oxide         thereof and/or a solvate thereof and/or a pro-drug form thereof,         provided that when R₂ is hydrogen and R₄ is selected from the         group consisting of C₃₋₁₀ cycloalkyl, aryl and heterocyclyl, R₇         is not C₃₋₁₀ cycloalkyl, aryl or heterocyclyl, and provided that         said quinazoline derivative is not         2-amino-4-ethoxy-6-(4-fluorophenyl)-quinazoline or         4-ethoxy-6-(4-fluorophenyl)-quinazoline.

In particular, R₂ may be hydrogen, or A is oxygen and R₄ is ethyl, or Y is a bond and R₆ is 4-fluorophenyl.

In said aspect of the invention, the novel quinazoline derivatives are as defined in the structural formula (I), wherein each of the substituents A, Y, R′, R″, R₂, R₄, R₆, R₇, R₈, R₉, R₉′, R₁₀, R₁₁, R₁₂, R₁₃, R₁₄, R₁₅ and R₁₆ may independently correspond to any part of the definitions given herein-above, in particular with any of the individual meanings (such as illustrated above) of generic terms used for substituting groups such as, but not limited to, “C₁₋₇ alkyl”, “C₃₋₁₀ cycloalkyl”, “C₂₋₇ alkenyl”, “C₃₋₁₀ cycloalkenyl”, “C₂₋₇ alkynyl”, “aryl”, “heterocyclyl”, “C₁₋₇ alkylene”, “halogen”, “C₃₋₁₀ cycloalkenyl”, “alkylaryl”, “arylalkyl”, “alkylamino”, “alkenylamino”, “alkynylamino”, “heterocyclic-substituted C₁₋₇ alkyl”, “hydroxyalkylamino”, “mercaptoalkylamino”, “C₁₋₇ alkoxy”, “C₁₋₇ alkylthio”, and the like.

Stereoisomers of the disubstituted and trisubstituted quinazoline derivatives of this invention may be formed by using reactants in their single enantiomeric form wherever possible in the manufacturing process, or by resolving a mixture of stereoisomers by conventional methods. One such method is liquid chromatography using one or more suitable chiral stationary phases including, for example, polysaccharides, in particular cellulose or amylose derivatives. Commercially available, but non limiting, suitable polysaccharide-based chiral stationary phases are ChiralCel™ CA, OA, OB, OC, OD, OF, OG, OJ and OK, and Chiralpak™ AD, AS, OP(+) and OT(+). Appropriate eluents or mobile phases for use in combination with said polysaccharide-based chiral stationary phases are hydrocarbons such as hexane and the like, optionally admixed with an alcohol such as ethanol, isopropanol and the like. The above mixture of enantiomers may alternatively be separated by making use of microbial resolution or by resolving the diastereoisomeric salts formed with chiral acids such as mandelic acid, camphorsulfonic acid, tartaric acid, lactic acid and the like or with chiral bases such as brucine and the like. The resolving agent may be cleaved from the separated diastereoisomers, e.g. by treatment with acids or bases, in order to generate the pure enantiomers of the compounds of the invention. Conventional resolution methods were compiled e.g. by Jaques et al. in “Enantiomers, Racemates and Resolution” (Wiley Interscience, 1981).

As noted above, one particular embodiment of this invention includes the various precursors or “pro-drug” forms of the disubstituted and trisubstituted quinazoline derivatives of the present invention. It may be desirable to formulate the compounds of the present invention in the form of a chemical species which itself is not significantly biologically-active but which, when delivered to the body of a human being or higher mammal, will undergo a chemical reaction catalyzed by the normal function of the body, inter alia, enzymes present in the stomach or in blood serum, said chemical reaction having the effect of releasing a compound as defined herein. The term “pro-drug” thus relates to these species which are converted in vivo into the active pharmaceutical ingredient.

The pro-drugs of the present invention can have any form suitable to the formulator, for example, esters are non-limiting common pro-drug forms. In the present case, however, the pro-drug may necessarily exist in a form wherein a covalent bond is cleaved by the action of an enzyme present at the target locus. For example, a C—C covalent bond may be selectively cleaved by one or more enzymes at said target locus and, therefore, a pro-drug in a form other than an easily hydrolysable precursor, inter alia an ester, an amide, and the like, may be used.

For the purposes of the present invention the term “therapeutically suitable pro-drug” is defined herein as a compound modified in such a way as to be transformed in vivo to the therapeutically active form, whether by way of a single or by multiple biological transformations, when in contact with the tissues of humans or mammals to which the pro-drug has been administered, and without undue toxicity, irritation, or allergic response, and achieving the intended therapeutic outcome.

It is another aspect of invention to provide a quinazoline selected from the group consisting of:

-   2-amino-6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-(2-methoxyethoxy)-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-isopropoxy-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-(cyclopropyl-methoxy)-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-[N-(2-hydroxyethyl)morpholin-1-yl]-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-(trifluoromethoxy)-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-ethoxy-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-methoxy-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-butoxy-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-sec-butoxy-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-tert-butoxy-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-propoxy-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-benzyloxy-quinazoline -   2-amino-6-(3,4-dimethoxyphenyl)-4-cyclopentyloxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-hydroxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-(2-methoxyethoxy)-quinazoline -   2-amino-6-(4-fluorophenyl)-4-isopropoxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-(cyclopropyl-methoxy)-quinazoline -   2-amino-6-(4-fluorophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline -   2-amino-6-(4-fluorophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline -   2-amino-6-(4-fluorophenyl)-4-(trifluoromethoxy)-quinazoline -   2-amino-6-(4-fluorophenyl)-4-ethoxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-methoxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-butoxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-sec-butoxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-tert-butoxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-propoxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-benzyloxy-quinazoline -   2-amino-6-(4-fluorophenyl)-4-cyclopentyloxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-hydroxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-isopropoxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-(2-methoxyethoxy)-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-ethoxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-(cyclopropyl-methoxy)-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-(trifluoromethoxy)-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-methoxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-butoxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-sec-butoxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-tert-butoxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-propoxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-benzyloxy-quinazoline -   2-amino-6-(4-acetamidophenyl)-4-cyclopentyloxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-(2-methoxyethoxy)-quinazoline -   6-(3,4-dimethoxyphenyl)-4-isopropoxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-(cyclopropyl-methoxy)-quinazoline -   6-(3,4-dimethoxyphenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline -   6-(3,4-dimethoxyphenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline -   6-(3,4-dimethoxyphenyl)-4-(trifluoromethoxy)-quinazoline -   6-(3,4-dimethoxyphenyl)-4-ethoxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-methoxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-butoxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-sec-butoxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-tert-butoxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-propoxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-benzyloxy-quinazoline -   6-(3,4-dimethoxyphenyl)-4-cyclopentyloxy-quinazoline -   6-(4-fluorophenyl)-4-hydroxy-quinazoline -   6-(4-fluorophenyl)-4-(2-methoxyethoxy)-quinazoline -   6-(4-fluorophenyl)-4-isopropoxy-quinazoline -   6-(4-fluorophenyl)-4-(cyclopropyl-methoxy)-quinazoline -   6-(4-fluorophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline -   6-(4-fluorophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline -   6-(4-fluorophenyl)-4-(trifluoromethoxy)-quinazoline -   6-(4-fluorophenyl)-4-ethoxy-quinazoline -   6-(4-fluorophenyl)-4-methoxy-quinazoline -   6-(4-fluorophenyl)-4-butoxy-quinazoline -   6-(4-fluorophenyl)-4-sec-butoxy-quinazoline -   6-(4-fluorophenyl)-4-tert-butoxy-quinazoline -   6-(4-fluorophenyl)-4-propoxy-quinazoline -   6-(4-fluorophenyl)-4-benzyloxy-quinazoline -   6-(4-fluorophenyl)-4-cyclopentyloxy-quinazoline -   6-(4-acetamidophenyl)-4-hydroxy-quinazoline -   6-(4-acetamidophenyl)-4-isopropoxy-quinazoline -   6-(4-acetamidophenyl)-4-(2-methoxyethoxy)-quinazoline -   6-(4-acetamidophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline -   6-(4-acetamidophenyl)-4-ethoxy-quinazoline -   6-(4-acetamidophenyl)-4-(cyclopropyl-methoxy)-quinazoline -   6-(4-acetamidophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline -   6-(4-acetamidophenyl)-4-(trifluoromethoxy)-quinazoline -   6-(4-acetamidophenyl)-4-methoxy-quinazoline -   6-(4-acetamidophenyl)-4-butoxy-quinazoline -   6-(4-acetamidophenyl)-4-sec-butoxy-quinazoline -   6-(4-acetamidophenyl)-4-tert-butoxy-quinazoline -   6-(4-acetamidophenyl)-4-propoxy-quinazoline -   6-(4-acetamidophenyl)-4-benzyloxy-quinazoline -   6-(4-acetamidophenyl)-4-cyclopentyloxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-(2-methoxyethoxy)-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-isopropoxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-(cyclopropyl-methoxy)-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-(trifluoromethoxy)-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-ethoxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-methoxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-butoxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-sec-butoxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-tert-butoxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-propoxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-benzyloxy-quinazoline -   2-acetamino-6-(3,4-dimethoxyphenyl)-4-cyclopentyloxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-hydroxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-(2-methoxyethoxy)-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-isopropoxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-(cyclopropyl-methoxy)-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-(trifluoromethoxy)-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-ethoxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-methoxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-butoxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-sec-butoxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-tert-butoxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-propoxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-benzyloxy-quinazoline -   2-acetamino-6-(4-fluorophenyl)-4-cyclopentyloxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-hydroxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-isopropoxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-(2-methoxyethoxy)-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-ethoxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-(cyclopropyl-methoxy)-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-(trifluoromethoxy)-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-methoxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-butoxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-sec-butoxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-tert-butoxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-propoxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-benzyloxy-quinazoline -   2-acetamino-6-(4-acetamidophenyl)-4-cyclopentyloxy-quinazoline -   6-(2,3-Difluoro-phenyl)-4-ethoxy-quinazolin-2-ylamine -   4-Ethoxy-6-p-tolyl-quinazolin-2-ylamine -   4-Ethoxy-6-furan-3-yl-quinazolin-2-ylamine -   4-Ethoxy-6-(2H-pyrazol-3-yl)-quinazolin-2-ylamine -   4-Ethoxy-6-thiophen-2-yl-quinazolin-2-ylamine -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-methyl-benzamide -   4-Ethoxy-6-furan-2-yl-quinazolin-2-ylamine -   4-Ethoxy-6-thiophen-3-yl-quinazolin-2-ylamine -   6-(3,4-Difluoro-phenyl)-4-ethoxy-quinazolin-2-ylamine -   3-(2-Amino-4-ethoxy-quinazolin-6-yl)-benzonitrile -   4-Ethoxy-6-(2H-pyrazol-4-yl)-quinazolin-2-ylamine -   6-(4-Amino-phenyl)-4-ethoxy-quinazolin-2-ylamine -   4-Ethoxy-6-(2,3,4-trifluoro-phenyl)-quinazolin-2-ylamine -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenol -   6-(2,3-Difluoro-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine -   4-(2-Methoxy-ethoxy)-6-(2-trifluoromethyl-phenyl)-quinazolin-2-ylamine -   6-(5-Chloro-thiophen-2-yl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine -   4-(2-Methoxy-ethoxy)-6-p-tolyl-quinazolin-2-ylamine -   6-Benzo[b]thiophen-2-yl-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine -   6-Benzofuran-2-yl-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine -   4-(2-Methoxy-ethoxy)-6-thiophen-2-yl-quinazolin-2-ylamine -   4-(2-Amino-4-(2-methoxy-ethoxy)-quinazolin-6-yl)-N-methyl-benzamide -   4-(2-Methoxy-ethoxy)-6-furan-2-yl-quinazolin-2-ylamine -   4-(2-Methoxy-ethoxy)-6-thiophen-3-yl-quinazolin-2-ylamine -   6-(3,4-Difluoro-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine -   3-(2-Amino-4-(2-methoxy-ethoxy)-quinazolin-6-yl)-benzonitrile -   4-(2-Methoxy-ethoxy)-6-(2H-pyrazol-4-yl)-quinazolin-2-ylamine -   6-(4-Amino-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine -   4-(2-Methoxy-ethoxy)-6-(2,3,4-trifluoro-phenyl)-quinazolin-2-ylamine -   6-(4-Fluoro-2-methyl-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine -   4-[2-Amino-4-(2-methoxy-ethoxy)-quinazolin-6-yl]-phenol -   6-(4-Chloro-3-trifluoromethyl-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine -   4-Benzyloxy-6-(2H-pyrazol-3-yl)-quinazolin-2-ylamine -   4-(2-Amino-4-benzyloxy-quinazolin-6-yl)-N-methyl-benzamide -   4-Benzyloxy-6-(1H-pyrazol-4-yl)-quinazolin-2-ylamine -   4-[2-(2-Dimethylamino-ethoxy)-ethoxy]-6-(4-trifluoromethoxy-phenyl)-quinazolin-2-ylamine -   6-(2,4-Difluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine -   6-(2,3-Difluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine -   4-Isopropoxy-6-(3-trifluoromethyl-phenyl)-quinazolin-2-ylamine -   4-Isopropoxy-6-(2-trifluoromethyl-phenyl)-quinazolin-2-ylamine -   4-Isopropoxy-6-(4-chloro-phenyl)-quinazolin-2-ylamine -   4-Isopropoxy-6-p-tolyl-quinazolin-2-ylamine -   6-(2,4-Dichloro-phenyl)-4-isopropoxy-quinazolin-2-ylamine -   6-(2-Chloro-4-fluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine -   6-(3-Chloro-phenyl)-4-isopropoxy-quinazolin-2-ylamine -   6-Benzo[b]thiophen-2-yl-4-isopropoxy-quinazolin-2-ylamine -   6-Furan-3-yl-4-isopropoxy-quinazolin-2-ylamine -   4-Isopropoxy-6-(2H-pyrazol-3-yl)-quinazolin-2-ylamine -   6-Benzofuran-2-yl-4-isopropoxy-quinazolin-2-ylamine -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-methyl-benzamide -   6-Furan-2-yl-4-isopropoxy-quinazolin-2-ylamine -   4-Isopropoxy-6-thiophen-3-yl-quinazolin-2-ylamine -   4-Isopropoxy-6-pyridin-3-yl-quinazolin-2-ylamine -   6-(3,4-Difluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine -   4-Isopropoxy-6-pyridin-4-yl-quinazolin-2-ylamine -   3-(2-Amino-4-isopropoxy-quinazolin-6-yl)-benzonitrile -   6-(3,5-Difluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine -   4-Isopropoxy-6-(4-trifluoromethoxy-phenyl)-quinazolin-2-ylamine -   6-(4-Amino-phenyl)-4-isopropoxy-quinazolin-2-ylamine -   4-Isopropoxy-6-(2,3,4-trifluoro-phenyl)quinazolin-2-ylamine -   6-(2-Benzyloxy-phenyl)-4-isopropoxy-quinazolin-2-ylamine -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-benzonitrile -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenol -   4-Isopropoxy-6-quinolin-3-yl-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(2,4-difluoro-phenyl)-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(2,3-difluoro-phenyl)-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-o-tolyl-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(3-trifluoromethyl-phenyl)-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-p-tolyl-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(2,4-dichloro-phenyl)-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(4-ethoxy-phenyl)-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(2-chloro-4-fluoro-phenyl)-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-furan-3-yl-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(3-chloro-4-fluoro-phenyl)-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(2H-pyrazol-3-yl)-quinazolin-2-ylamine -   6-Benzofuran-2-yl-4-cyclobutylmethoxy-quinazolin-2-ylamine -   4-(2-Amino-4-cyclobutylmethoxy-quinazolin-6-yl)-N-methyl-benzamide -   4-Cyclobutylmethoxy-6-furan-2-yl-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-thiophen-3-yl-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-pyridin-3-yl-quinazolin-2-ylamine -   3-(2-Amino-4-cyclobutylmethoxy-quinazolin-6-yl)-benzonitrile -   4-Cyclobutylmethoxy-6-(2H-pyrazol-4-yl)-quinazolin-2-ylamine -   4-Cyclobutylmethoxy-6-(2,3,4-trifluoro-phenyl)-quinazolin-2-ylamine -   4-(2-Amino-4-cyclobutylmethoxy-quinazolin-6-yl)-benzonitrile -   4-(2-Amino-4-cyclobutylmethoxy-quinazolin-6-yl)-phenol -   6-(2-Chloro-4-trifluoromethyl-phenyl)-4-cyclobutylmethoxy-quinazolin-2-ylamine -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N,N-dimethyl-benzamide -   [4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenyl]-pyrrolidin-1-yl-methanone -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N,N-dimethyl-benzamide -   [4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenyl]-morpholin-4-yl-methanone -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-benzyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-isobutyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-cyclohexyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-butyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-tert-butyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-cyclopentyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-isopropyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-methoxy-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-furan-2-ylmethyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-(2-dimethylamino-ethyl)-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-pyridin-2-yl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-(4-fluoro-phenyl)-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-(4,5-dihydro-thiazol-2-yl)-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-2-chloro-N-methyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-2-chloro-N-cyclopropyl-benzamide -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-phenol -   3-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-phenol -   4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-cyclopropyl-benzamide -   3-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-methyl-benzamide -   [4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenyl]-piperidin-1-yl-methanone -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-benzyl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-isobutyl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-cyclohexyl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-butyl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-tert-butyl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-cyclopentyl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-isopropyl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-methoxy-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-furan-2-ylmethyl-benzamide -   [4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenyl]-thiazolidin-3-yl-methanone -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-(2-dimethylamino-ethyl)-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-pyridin-2-yl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-(4-fluoro-phenyl)-benzamide -   [4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenyl]-thiomorpholin-4-yl-methanone -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-(4,5-dihydro-thiazol-2-yl)-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-2-chloro-N-methyl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-2-chloro-N-cyclopropyl-benzamide -   3-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenol -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-cyclopropyl-benzamide -   3-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-methyl-benzamide -   [4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenyl]-piperidin-1-yl-methanone -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-benzyl-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-isobutyl-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-cyclohexyl-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-butyl-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-tert-butyl-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-cyclopentyl-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-isopropyl-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-methoxy-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-(2-dimethylamino-ethyl)-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-(4-fluoro-phenyl)-benzamide -   [4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenyl]-thiomorpholin-4-yl-methanone -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-(4,5-dihydro-thiazol-2-yl)-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-2-chloro-N-methyl-benzamide -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-2-chloro-N-cyclopropyl-benzamide -   3-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenol -   4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-cyclopropyl-benzamide -   3-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-methyl-benzamide -   4-Ethoxy-6-[4-(5-methyl-[1,3,4]oxadiazol-2-yl)-phenyl]-quinazolin-2-ylamine -   4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-isobutyl-benzamide -   4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-cyclopentyl-benzamide -   4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-isopropyl-benzamide -   4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-methoxy-benzamide -   {4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-phenyl}-thiazolidin-3-yl-methanone -   4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-phenol -   3-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-phenol -   4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-cyclopropyl-benzamide -   {4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenyl}-piperidin-1-yl-methanone -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-benzyl-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-isobutyl-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-butyl-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-tert-butyl-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-cyclopentyl-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-isopropyl-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-methoxy-benzamide -   {4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenyl}-thiazolidin-3-yl-methanone -   {4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenyl}-thiomorpholin-4-yl-methanone -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-(4,5-dihydro-thiazol-2-yl)-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-2-chloro-N-methyl-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-2-chloro-N-cyclopropyl-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenol -   3-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenol -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-cyclopropyl-benzamide -   4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-methyl-benzamide -   (S)-4-[2-Amino-4-(tetrahydro-furan-2-ylmethoxy)-quinazolin-6-yl]-N-cyclopropyl-benzamide -   4-(2-Amino-4-ethoxy-quinazolin-6-yl)-benzamide -   (S)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-cyclopropyl-benzamide -   (S)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(2-dimethylamino-ethyl)-benzamide -   (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(2-morpholin-4-yl-ethyl)-benzamide -   (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(2-pyrrolidin-1-yl-ethyl)-benzamide -   (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(2,2,2-trifluoro-ethyl)-benzamide -   (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(3-pyrrolidin-1-yl-propyl)-benzamide -   (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-[2-(1-methyl-pyrrolidin-2-yl)-ethyl]-benzamide -   (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(1,1-dimethyl-2-morpholin-4-yl-ethyl)-benzamide -   (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(1,1-dimethyl-2-pyrrolidin-1-yl-ethyl)-benzamide -   (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(1-cyano-cyclopropyl)-benzamide -   (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(1-isopropyl-piperidin-4-yl)-benzamide -   6-(2,4-Bis-trifluoromethyl-phenyl)-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine -   6-Benzofuran-2-yl-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine -   6-(3-Chloro-4-fluoro-phenyl)-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine -   6-(2,4-Dichloro-phenyl)-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine -   4-(3-Dimethylamino-propoxy)-6-(3,4,5-trifluoro-phenyl)-quinazolin-2-ylamine -   4-(3-Dimethylamino-propoxy)-6-(3,5-dimethyl-phenyl)-quinazolin-2-ylamine -   6-(4-Chloro-phenyl)-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine -   4-(3-Dimethylamino-propoxy)-6-(3-trifluoromethyl-phenyl)-quinazolin-2-ylamine -   6-(4-Chloro-3-trifluoromethyl-phenyl)-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine -   4-[2-Amino-4-(2-morpholin-4-yl-ethoxy)-quinazolin-6-yl]-phenol -   4-(2-Morpholin-4-yl-ethoxy)-6-thiophen-3-yl-quinazolin-2-ylamine -   4-(2-Morpholin-4-yl-ethoxy)-6-thiophen-2-yl-quinazolin-2-ylamine -   6-Benzofuran-2-O-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine -   6-Furan-3-yl-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine -   6-Benzo[b]thiophen-2-yl-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine -   4-(2-Morpholin-4-yl-ethoxy)-6-(2-trifluoromethyl-phenyl)-quinazolin-2-ylamine -   4-(2-Morpholin-4-yl-ethoxy)-6-(3-trifluoromethyl-phenyl)-quinazolin-2-ylamine -   6-(2,3-Difluoro-phenyl)-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine -   4-isopropoxy-6-thiophen-3-yl-quinazoline -   4-(4-Isopropoxy-quinazolin-6-yl)-N-methyl-benzamide -   4-(4-(2-methoxyethoxy)-quinazolin-6-yl)-N-methyl-benzamide -   4-ethoxy-6-(1H-pyrazo-4-yl)-quinazoline -   6-(4-Fluoro-phenyl)-4-isopropoxy-quinazoline -   (S)-4-(2-(4-fluorobenzylamino)-4-(tetrahydrofuran-3-yloxy)quinazolin-6-yl)-N-(2-(dimethylamino)ethyl)benzamide -   4-{[4-Ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl)-benzenesulfonamide -   4-{[6-(3-Cyclopropanesulfonylamino-4-fluoro-phenyl)-4-ethoxy-quinazolin-2-ylamino]-methyl}-benzenesulfonamide. -   4-([6-(3-aminosulfonyl-phenyl)-4-ethoxy-quinazolin-2-ylamino]-methyl}-benzenesulfonamide. -   Pyrrolidine-1-carboxylic acid     {4-[4-ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-phenyl}-amide. -   4-{[4-Ethoxy-6-(4-ureido-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide. -   4-[4-Ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-benzamide. -   N-Cyclopropyl-4-[4-ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-benzamide -   4-Ethoxy-2-(4-fluorobenzylamino)-6-(4-fluoro-phenyl)-quinazoline. -   N-cyclopropyl-4-[4-ethoxy-2-(4-fluorobenzylamino)-quinazolin-6-yl]-benzamide. -   6-(4-Fluorophenyl)-4-propyl-quinazoline,     and/or a pharmaceutically acceptable addition salt thereof and/or a     stereoisomer thereof and/or a mono- or a di-N-oxide thereof and/or a     solvate.

In another aspect, the present invention provides the use of a disubstituted and trisubstituted quinazoline derivative having the structural formula (I) as defined herein-above for the manufacture of a medicament for treating or preventing a viral infection, and the corresponding method of treatment of a viral infection by administering an effective amount of such a quinazoline derivative to a patient in need thereof. In particular, said viral infection may be an infection caused by a virus being a member of the Flaviviridae family. The Flaviviridae family is a family of positive-strand RNA viruses which includes the following genera:

-   -   Genus Flavivirus (type species include Yellow fever virus, West         Nile virus and Dengue Fever),     -   Genus Hepacivirus (type species includes Hepatitis C virus), and     -   Genus Pestivirus (type species include Bovine viral diarrhea         virus, classical swine fever and hog cholera).

More in particular, said Flavivirus is the Hepatitis C virus (hereinafter referred as HCV).

In another aspect, the present invention provides different methods for making 4,6-disubstituted and 2,4,6-trisubstituted quinazoline derivatives having the structural formula (I) as defined above with respect to the first aspect of the invention. Methods of manufacture have been developed by the present inventors which may be used alternatively to, or may be combined with, the methods of synthesis already known in the art of quinazoline derivatives (depending upon the targeted final compound). For instance, synthesis of mono- and di-N-oxides of the quinazoline derivatives of this invention can easily be achieved by treating the said derivatives with an oxidizing agent such as, but not limited to, hydrogen peroxide (e.g. in the presence of acetic acid) or a peracid such as, but not limited to, chloroperbenzoic acid. The methods for making the quinazoline derivatives of the present invention will now be explained in more details by reference to the appended FIGS. 1 to 7 wherein the notation “Ar” stands for aryl, the notation “Ac” stands for acetyl, and “X” in general, unless otherwise stated, stands for a halogen atom, preferably chlorine, bromine or iodine, and wherein R₂ and R₄ are as defined in the above structural formula (I) and more specifically may correspond to any of the individual meanings disclosed above.

In the following description of certain reaction steps involved in each figure, reference is made to the use of certain catalysts and/or certain types of solvents. It should be understood that each catalyst mentioned should be used in a catalytic amount well known to the skilled person with respect to the type of reaction involved. Solvents that may be used in the following reaction steps include various kinds of organic solvents such as protic solvents, polar aprotic solvents and non-polar solvents as well as aqueous solvents which are inert under the relevant reaction conditions. More specific examples include aromatic hydrocarbons, chlorinated hydrocarbons, ethers, aliphatic hydrocarbons, alcohols, esters, ketones, amides, water or mixtures thereof, as well as supercritical solvents such as carbon dioxide (while performing the reaction under supercritical conditions). The suitable reaction temperature and pressure conditions applicable to each kind of reaction step will not be detailed herein but do not depart from the relevant conditions already known to the skilled person with respect to the type of reaction involved and the type of solvent used (in particular its boiling point).

The 4,6-disubstituted and 2,4,6-trisubstituted quinazoline derivatives having the structural formula (I) can be synthesized, without limitation, according to one or more of the following procedures.

FIG. 1 schematically shows methods for making 2-amino-4,6-disubstituted quinazoline derivatives according to the present invention. In step (a), a 5-halo-anthranilic acid (X is preferably chlorine, bromine or iodine), is condensed with chloroformamidine in order to construct a 2-amino-4-hydroxy-6-haloquinazoline scaffold. Although FIG. 1 shows only an aryl substituent on position 6 of the quinazoline scaffold, the present method is not limited thereto and is also applicable to quinazoline derivatives wherein the 6-substituent is other than aryl, e.g. heterocyclyl, heteroaryl, or a C-linked unsaturated substituent such as alkenyl or alkynyl. The halogen at position 6 (X is preferably chlorine, bromine or iodine) of this quinazoline scaffold can be used in step (b) for a wide variety of palladium-catalyzed cross-coupling reactions, such as, but not limited to, a Suzuki reaction (i.e. a reaction with an arylboronic acid, heteroarylboronic acid or pinacol esters thereof, leading to the formation of 2-amino-4-hydroxy-6-arylquinazolines as shown in FIG. 1), a Heck reaction (i.e. a reaction with a terminal alkene affording the corresponding 2-amino-4-hydroxy-6-alkenylquinazoline derivatives, not shown in FIG. 1), or a Sonogashira reaction (i.e. a reaction with a terminal alkyne affording the corresponding 2-amino-4-hydroxy-6-alkynylquinazoline derivatives, not shown in FIG. 1). As shown in step (c), the amino group at position 2 of the quinazoline scaffold is then protected from further reactions with for example (but not limited to) an acetyl group (as shown in the figure, e.g. by reaction with acetic anhydride in pyridine) or a pivaloyl group (e.g. by reaction with pivaloyl anhydride in pyridine, not shown in the figure). Activation of the tautomeric hydroxyl group at position 4 of the quinazoline scaffold then occurs in step (d) by introducing a readily leaving group (indicated by the letter L in FIG. 1) at position 4 of the quinazoline scaffold. Suitable leaving groups include, but are not limited to, chlorine and 1,2,4-triazolyl. The 2-(protected amino)-4-(1,2,4-triazolyl)-6-substituted quinazoline derivative can be obtained for instance by treating the 2-(protected amino)-4-hydroxy-6-substituted quinazoline derivative with POCl₃ or 4-chloro-phenyl phosphorodichloridate and 1,2,4-triazole in an appropriate solvent such as, but not limited to, pyridine, acetonitrile or dichloromethane. The 2-(protected amino)-4-chloro-6-substituted quina-zoline derivative can be obtained by treating the 2-(protected amino)-4-hydroxy-6-substituted quinazoline derivative with thionyl chloride or POCl₃. Nucleophilic displacement of the triazolyl group or chlorine atom then occurs in step (e) through reaction with an appropriate nucleophilic reagent having the structural formula RAM wherein:

-   -   R₄ is as defined with respect to structural formula (I),     -   A is selected from oxygen and sulfur, and     -   M is an alkaline metal, preferably sodium or potassium.

Suitable examples of nucleophilic reagents include, but are not limited to, sodium or potassium alkoxides, sodium or potassium alkenyl oxides, sodium or potassium cycloalkyl oxides, sodium or potassium cycloalkenyl oxides, sodium or potassium aryl oxides, sodium or potassium arylalkyl oxides, sodium or potassium cycloalkyl-alkyl oxides, sodium or potassium heterocyclic oxides, sodium or potassium heterocyclic-substituted alkyl oxides, and the correspondingly respective sodium or potassium thiolates. The respective oxides and thiolates may also be prepared in situ using methods know to the skilled person. Step (e) is preferably performed in an aprotic solvent such as, for example, dioxane or tetrahydrofuran. Introduction of a nucleophilic substituent R₄A on position 4 of the quinazoline scaffold in step (e) may concomitantly lead to deprotection of the amino group at position 2 of said scaffold (as shown in FIG. 1). If no such deprotection is observed during step (e), then in a final additional step (not shown in FIG. 1), the amino-protecting group at position 2 has to be cleaved off using standard deprotection sequences such as, but not limited to, acidic or basic hydrolysis.

In order to introduce a carbon linker at position 4 of the quinazoline scaffold, i.e. when A is a bond, C₁₋₇ alkylene, C₂₋₄ alkenylene, or C₂₋₇ alkynylene, then a nucleophilic displacement reaction can be effected by mixing the 2-(protected amino)-4-chloro-6-substituted or 2-(protected amino)-4-(1,2,4-triazolyl)-6-substituted quinazoline derivative with an appropriate Grignard reagent in a dry, polar, aprotic solvent such as for example 1,4-dioxane, diethyl ether or tetrahydrofuran. A broad range of suitable Grignard reagents is commercially available such as, but not limited to, benzylmagnesiunn chloride, methylmagnesium bromide, methylmagnesium chloride, methylmagnesium iodide, ethylmagnesium bromide, ethylmagnesium chloride, propylmagnesium chloride, n-butylmagnesium chloride, sec-butylmagnesium chloride, tert-butylmagnesium chloride, pentylmagnesium bromide, allylmagnesium bromide, allylmagnesium chloride, ethynylmagnesium chloride, (trimethylsilyl)methylmagnesium chloride, phenylmagnesium bromide, 4-methoxyphenylmagnesium bromide, 4-chlorophenylmagnesium bromide, 4-fluorophenylmagnesium bromide, 1-naphthylmagnesium bromide, phenyl-magnesium chloride, vinylmagnesium bromide, vinylmagnesium chloride, cyclohexylmagnesium chloride, and the like. Alternatively, the above-listed Grignard reagents as well as those which are not commercially available are obtainable using methods well known to the skilled person, or can be made in situ if desired. Alternatively, 2-(protected amino)-4-chloro-6-substituted quinazoline derivatives can also serve as excellent starting materials for a wide variety of organometallic cross-coupling reactions, which are well known in the art (see e.g. F. Diederich et al., Metal-Catalyzed Cross-Coupling reactions, Wiley-VCH, New York, 1998). Examples of cross-coupling reactions include, but are not limited to, a Negishi reaction (i.e. a nickel or palladium catalyzed coupling of organozinc compounds with an aryl- or heteroarylhalide), Stille coupling (i.e. a palladium catalysed coupling reaction between an aryl- or heteroaryl halide and a stannane), Suzuki coupling (i.e. a palladium catalysed cross coupling reaction between an organoboronic acid and an aryl- or heteroarylhalide), Kumada coupling (which is a palladium or nickel catalyzed coupling of a Grignard reagent with an aryl- or heteroarylhalide), Heck reaction (which is the palladium-catalyzed C—C coupling between an aryl- or heteroaryl halide and an activated alkene in the presence of a base), Sonogashira reaction (i.e. the coupling of a terminal alkyne with an aryl- or heteroarylhalide with a palladium catalyst, a copper (I) co-catalyst, and an amine base). In each of the above types of reaction, the 4-chloroquinazoline moiety will serve as the heteroaryl halide.

FIG. 2 schematically shows a method for making 4,6-disubstituted quinazoline derivatives according to the present invention. In step (a) 5-halo-anthranilic acid represented by the formula 1 (wherein X is preferably chlorine, bromine or iodine) is condensed with formamide in order to construct the 4-hydroxy-6-haloquinazoline scaffold. Although FIG. 1 shows only an aryl substituent on position 6 of the quinazoline scaffold, the present method is not limited thereto and is also applicable to quinazoline derivatives wherein the 6-substituent is other than aryl, e.g. heterocyclyl, heteroaryl, or a C-linked unsaturated substituent such as alkenyl or alkynyl, the construction of which has been previously described with respect to FIG. 1 (Heck reaction and Sonogashira reaction). In step (b) the halogen atom at position 6 of this scaffold can be used for a wide variety of palladium-catalyzed cross-coupling reactions, such as for example, but not limited to, Suzuki reactions (reactions with aryl boronic acid, heteroarylboronic acid or pinacol esters thereof, leading to the formation of 4-hydroxy-6-arylquinazolines, as shown in FIG. 2), Heck reactions (reaction with terminal alkenes affording 4-hydroxy-6-alkenylquinazolines, not shown in FIG. 2), Sonogashira reaction (reaction with terminal alkynes giving rise to 4-hydroxy-6-alkynyl quinazoline derivatives, not shown in FIG. 2). Activation of the tautomeric hydroxyl group at position 4 of the quinazoline scaffold occurs in step (c) by introducing a readily leaving group (indicated by the letter L in FIG. 2) at position 4 of the quinazoline scaffold, in a manner similar as described with respect to FIG. 1. Nucleophilic displacement of the leaving group L (e.g. triazolyl or chloro) occurs in step (d) by reaction with an appropriate nucleophilic reagent R₄AM, as previously described with respect to FIG. 1. In order to introduce a carbon linker at position 4 of the quinazoline scaffold, a nucleophilic displacement reaction can be effected by mixing the 4-chloro-6-substituted or 4-(1,2,4-triazolyl)-6-substituted quinazoline derivative with an appropriate Grignard reagent (such as previously described with respect to FIG. 1) in a dry, polar, aprotic solvent such as for example 1,4-dioxane, diethylether or tetrahydrofuran. This transformation may be catalyzed by a transition metal complex such as iron(III) tris-acetylacetonate. Alternatively, the 4-chloro-6-substituted quinazoline derivative can also serve as an excellent starting material for a wide variety of organometallic cross-coupling reactions, such as previously described with respect to FIG. 1.

FIG. 3 schematically shows an alternative method for making 2-amino-4,6-disubstituted quinazolines according to the present invention. Although FIG. 3 shows only an aryl substituent on position 6 of the quinazoline scaffold, the present method is not limited thereto and is also applicable to quinazoline derivatives wherein the 6-substituent is a heteroaryl, or a C-linked unsaturated substituent other than aryl, such as alkenyl or alkynyl, the construction of which has been previously described with respect to FIG. 1 (Heck reaction and Sonogashira reaction). In step (a), the oxo group of a 2-amino-4-hydroxy-6-substituted quinazoline derivative (e.g. 6-aryl shown in FIG. 3) is converted to a sulfhydryl group e.g. by treatment with phosphorus pentasulfide or Lawesson's reagent. The resulting 2-amino-4-sulfhydryl-6-substituted quinazoline derivative is then alkylated in step (b) by using an appropriate halogenated reagent with the structural formula R₄X (where X may be iodine, bromine or chlorine) under alkaline conditions (e.g. an aqueous sodium hydroxide solution of said reagent). R₄X may be for example, but is not limited to, an alkyl halide, alkenyl halide, cycloalkyl halide, cycloalkenyl halide, aryl halide, heterocyclic halide, arylalkyl halide, heterocyclic-substituted alkyl halide, or cycloalkyl-alkyl halide. In the specific case wherein R₄ is methyl, i.e. when a 2-amino-4-thiomethyl-6-substituted quinazoline derivative has been synthesized in step (b) e.g. by treatment with iodomethane, this thiomethyl group acts as a readily leaving group and may easily be replaced in step (c) by other suitable nucleophilic substituents through reaction with nucleophile reagents having the structural formula R₄AM, such as previously described with respect to FIG. 1. In addition, also carbon nucleophiles (such as for example Grignard reagents previously described with respect to FIG. 1) can be introduced in order to construct carbon linkers at position 4 of the quinazoline scaffold. In some cases, for example when less reactive nucleophiles such as aniline derivatives are used, it may be desirable to oxidize the sulfur atom of the thiomethyl group beforehand to the corresponding sulfoxide or sulfone in step (d). This may be achieved by using one or more oxidizing agents, such as, but not limited to, hydrogen peroxide, sodium periodate or m-chloro-perbenzoic acid. The resulting 2-amino-4-methylsulfone-6-substituted or 2-amino-4-methylsulfoxide-6-substituted quinazoline derivative may then be more easily reacted with a wide range of nucleophilic reagents.

FIG. 4 schematically shows a method for making 2-alkylamino-4,6-substituted quinazoline compounds according to this invention. Although FIG. 4 shows only an aryl substituent on position 6 of the quinazoline scaffold, the present method is not limited thereto and is also applicable to quinazoline derivatives wherein the 6-substituent is heterocyclyl, heteroaryl, or a C-linked unsaturated substituent other than aryl, such as alkenyl or alkynyl, the construction of which has been previously described with respect to FIG. 1 (Heck reaction and Sonogashira reaction). In step (a), the 2-amino-4,6-disubstituted quinazoline derivative is condensed with an aldehyde having the structural formula R′C(O)H in an appropriate solvent and in the presence of a suitable reducing agent. Suitable (and preferably commercially available) aldehydes include, but are not limited to, acetaldehyde, benzaldehyde, propionaldehyde, naphthaldehyde, salicyl-aldehyde and the like. Suitable solvents are for example methanol and acetonitrile. Suitable reducing agents include, but are not limited to, sodium cyanoborohydride, sodium triacetoxyborohydride and sodium borohydride. Alternatively this reductive amination reaction can also be carried out in step (b) by means of a ketone having the structural formula R′C(O)R″, wherein R′ and R″ may be the same or different and may be defined as with respect to formula (I). Suitable ketones include, but are not limited to, acetone, methylethylketone and acetophenone.

In particular, optionally mono-substituted or di-substituted benzaldehydes suitable as starting materials for the reaction of step (a) of the method illustrated by FIG. 4 include, but are not limited to, benzaldehyde, salicylaldehyde, o-tolualdehyde, m-tolualdehyde, p-tolualdehyde, o-anisaldehyde, m-anisaldehyde, p-anisaldehyde, 2,5-dihydroxybenzaldehyde, 4-propoxy-benzaldehyde, 4-phenoxy-benzaldehyde, 3-(3,4-dichlorophenoxy)benzaldehyde, 3-(3,5-dichlorophenoxy)benzaldehyde, 2-bromo-benzaldehyde, 3-bromobenzaldehyde, 4-bromo-benzaldehyde, 2-chloro-benzaldehyde, 3-chlorobenzaldehyde, 4-chlorobenzaldehyde, 2-fluorobenzaldehyde, 3-fluorobenz-aldehyde, 4-fluorobenzaldehyde, 2,3-dichlorobenzaldehyde, 2,4-dichlorobenzaldehyde, 2,6-dichlorobenzaldehyde, 3,4-dichlorobenzaldehyde, 3,5-dichlorobenzaldehyde, 2,3-difluorobenzaldehyde, 2,4-difluorobenzaldehyde, 2,5-difluorobenzaldehyde, 2,6-difluoro-benzaldehyde, 3,4-difluorobenzaldehyde, 3,5-difluorobenzaldehyde, 2,3,4-trifluoro-benzald ehyde, 2-(trifluoromethyl)benzaldehyde, 3-(trifluoromethyl)benzaldehyde, 4-(trifluoromethyl)benzaldehyde, 3-(trifluoromethoxy)benzaldehyde, 5-(trifluoromethoxy)-salicylaldehyde, 3,5-dichloro-salicyl-aldehyde, 2-nitrobenzaldehyde, 3-nitrobenzaldehyde, 4-nitrobenzaldehyde, 3-cyanobenzaldehyde, 4-cyano-benzaldehyde, 4-dimethylamino-1-naphthaldehyde, 4-(dimethylamino)benzaldehyde, 4-(diethylamino)benzaldehyde, 4-phenylbenzaldehyde and 3,4,5-trimethoxybenzaldehyde.

FIG. 5 schematically shows a method for making 2,4,6-trisubstituted quinazoline derivatives of this invention having a C-linked substituent on position 2 of the quinazoline scaffold such as but not limited to 2-alkyl-4,6-substituted quinazoline derivatives, 2-cycloalkyl-4,6-substituted quinazoline derivatives, 2-arylalkyl-4,6-substituted quinazoline derivatives, 2-aryl-4,6-substituted quinazoline derivatives, 2-alkenyl-4,6-substituted quinazoline derivatives, 2-cycloalkenyl-4,6-substituted quinazoline derivatives, 2-hetero-cyclic-4,6-substituted quinazoline derivatives, 2-[(heterocyclic-substituted) alkyl]-4,6-substituted quinazoline deriva-tives, or 2-[(cycloalkyl)alkyl]-4,6-substituted quinazoline derivatives, wherein each of said C-linked substituent on position 2 may optionally be further substituted. Although FIG. 5 shows only a halo substituent X or an aryl substituent on position 6 of the quinazoline scaffold, the present method is not limited thereto and is also applicable to quinazoline derivatives wherein the 6-substituent is a heteroaryl, or a C-linked unsaturated substituent other than aryl, such as alkenyl or alkynyl, the construction of which has been previously described with respect to FIG. 1 (Heck reaction and Sonogashira reaction). In step (a), the carboxylic acid moiety of a 5-halo-anthranilic acid (wherein preferably X is iodine, bromine or chlorine) is converted to the corresponding amide e.g. by treatment with suitable amounts of thionylchloride (or N,N′-dicyclohexylcarbodiimide) and ammonia. In step (b), the amino group is condensed with a suitable acid halide having the structural formula RC(O)X wherein X is preferably chlorine and wherein R may be alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl, heterocyclic, arylalkyl, heterocyclic-substituted alkyl or cycloalkyl-alkyl to provide the corresponding amide derivative 3. Non limiting examples of suitable acid halides include acetyl chloride, benzoyl chloride, propionyl chloride, and the like. In step (c), ring closure is effected by heating compound 3 under alkaline conditions, thus affording a 2-R-4-hydroxy-6-haloquinazoline derivative. Alternatively in step (d), a 5-halo-anthranilic acid (wherein preferably X is iodine, bromine or chlorine) is condensed in the presence of ammonium acetate with an appropriate ortho-ester having the structural formula RC(OEt)₃ wherein Et is ethyl and wherein R may be alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl, heterocyclic, arylalkyl, heterocyclic-substituted alkyl or cycloalkyl-alkyl in order to directly afford a 2-R-4-hydroxy-6-haloquinazoline derivative. The halogen atom at position 6 (preferably chlorine, bromine or iodine) of the quinazoline scaffold can then be used in step (e) for a wide variety of palladium-catalyzed cross-coupling reactions, such as for example, but not limited to, Suzuki reactions (reactions with aryl boronic acids), Heck reactions (reaction with terminal), and Sonogashira reactions (reaction with terminal alkynes) as previously described with respect to FIG. 1. Activation of the tautomeric hydroxyl group at position 4 of the quinazoline scaffold occurs in step (f) by introducing a readily leaving group (indicated by the letter L in FIG. 5) at position 4 of the quinazoline scaffold, as previously described with respect to FIG. 1. Nucleophilic displacement of the L group (e.g. triazolyl or chlorine) then occurs in step (g) by reaction, preferably in an aprotic solvent such as for example dioxane or tetrahydrofuran, with an appropriate nucleophile having the structural formula R₄AM as previously described with respect to FIG. 1. In order to introduce carbon linkers at position 4 of the quinazoline scaffold, a nucleophilic displacement reaction can be effected, preferably in a dry, polar, aprotic solvent such as for example 1,4-dioxane, diethylether or tetrahydrofuran, by means of an appropriate Grignard reagent as previously described with respect to FIG. 1. Alternatively, a 4-haloquinazoline derivative can also serve as an excellent starting material for a wide variety of organometallic cross-coupling reactions as previously described.

FIG. 6 schematically shows another method for making 2,4,6-trisubstituted quinazoline derivatives according to the present invention. In step (a), compound 1 is condensed with triphosgene in order to obtain a 2,4-dihydroxy-6-haloquinazoline (wherein preferably X is iodine, bromine or chlorine). The halogen atom at position 6 (preferably chlorine, bromine or iodine) of the quinazoline scaffold can then be used in step (b) for a wide variety of palladium-catalyzed cross-coupling reactions, such as for example, but not limited to, Suzuki reactions (reactions with aryl boronic acids), Heck reactions (reaction with terminal), and Sonogashira reactions (reaction with terminal alkynes) as previously described with respect to FIG. 1. Simultaneous activation of the tautomeric hydroxyl groups at positions 2 and 4 of the quinazoline scaffold occurs in step (c) by introducing readily leaving groups (indicated by the letter L in FIG. 6) at these positions in a manner similar as previously described with respect to FIG. 1. The leaving capacity of the L groups at positions 2 and 4 of the quinazoline scaffold is however usually different, which makes it possible to selectively displace the L group (e.g. chlorines or 1,2,4-triazolyl) at position 4, in step (d), by reaction with an appropriate nucleophilic reagent having the structural formula R₄AM as previously described with respect to FIG. 1. In the next step (e), the L group at position 2 (e.g. chlorine or 1,2,4-triazolyl) is displaced by a second nucleophilic agent, which can be the same as or can be different from the first nucleophilic agent used in step (d). In order to introduce carbon linkers at position 4 of the quinazoline scaffold, a nucleophilic displacement reaction can be effected by mixing the 4-chloro or the 4-(1,2,4-triazolyl) quinazoline derivative with an appropriate Grignard reagent as previously described with respect to FIG. 1. Alternatively, the 4-chloro quinazoline derivative may be an excellent starting material for a wide variety of organometallic cross-coupling reactions, as previously described with respect to FIG. 1.

FIG. 7 schematically shows an alternative method for making 2,4,6-trisubstituted quinazolines according to the present invention. In step (a), treatment of a 3-amino-6-halo-pyridine-2-carboxylic acid amide (X is preferably chlorine, bromine or iodine) with thiophosgene in an aprotic solvent gives the 2-thio-4-oxo-quinazoline scaffold. In step (b), the sulfhydryl group at position 2 is alkylated with an alkylating reagent such as methyl iodide in the presence of a base, such as a metal alkoxide, in an aprotic solvent. In step (c), the resulting 2-alkylthio-4-oxoquinazoline is oxidized to the sulfoxide or sulfone with an oxidant such as m-chloroperbenzoic acid, facilitating nucleophilic displacement at the 2-position with nucleophiles bearing the general formula R₂H such as alkyl-, benzyl- or arylamines, as depicted in step (d). Activation of the tautomeric hydroxyl group at position 4 of the quinazoline scaffold for the subsequent nucleophilic displacement reaction occurs in step (e) by preparing the corresponding 4-(1,2,4-triazolyl)-quinazoline or 4-chloro-quinazoline derivatives. The 4-triazolyl derivative can be obtained by treating the 4-oxo-quinazoline derivative with POCl₃ or 4-chlorophenyl phosphorodichloridate and 1,2,4-triazole in an appropriate solvent such as, but not limited to, pyridine or acetonitrile. The 4-chloro derivative can be obtained by treating the 4-oxo-quinazoline derivative with thionyl chloride or POCl₃. The chlorine atom or triazolyl group is designated as L in FIG. 7. Nucleophilic displacement of the triazolyl group or chlorine atom occurs in step (f) by reaction with an appropriate nucleophile having the general formula R₄AH or R₄AM (as defined for FIG. 1) in a polar aprotic solvent. Suitable examples of nucleophilic reagents having the general formula R₄AM include sodium or potassium alkoxides. Palladium-mediated aryl-aryl cross coupling (Suzuki type) occurs in step (g) by treating the 6-haloquinazoline with an arylboronic acid, heteroarylboronic acid or pinacol esters thereof, in the presence of aqueous base and a palladium(0) catalyst such as Pd(PPh₃)₄ to give the desired 6-arylquinazolines and 6-heteroarylq uinazolines.

Suitable commercially available reagents for use in step (d) of FIG. 7 include, but are not limited to, 2-chlorobenzylamine, 4-chlorobenzylamine, 2,4-dichlorobenzylamine, 3,4-dichlorobenzylamine, 4-methoxybenzylamine, 4-methylbenzylamine, piperonylamine, 3,4-dimethoxybenzylamine, 3-methylbenzylamine, 3-fluorobenzylamine, 2-methylbenzyl-amine, 2-methoxybenzylamine, 3-methoxybenzylamine, 2-fluorobenzylamine, 4-fluorobenzylamine, 3,4-dihydroxybenzylamine, 3-chlorobenzylamine, 4-(trifluoromethoxy)benzylamine, 2,6-difluorobenzylamine, 3,5-bis(trifluoromethyl)benzylamine, 2,4-difluorobenzylamine, 2,5-difluorobenzylamine, 3,4-difluorobenzylamine, 2-(trifluoromethyl)benzylamine, 3-(trifluoromethyl)benzylamine, 2-bromobenzylamine, 4-bromobenzylamine, 2-chloro-6-fluorobenzylamine, 2,5-dimethylbenzylamine, 3,4,5-trimethoxybenzylamine, 2,4,6-trimethylbenzylamine, 2,4-dimethylbenzylamine, 2,3-dichlorobenzylamine, 1-naphthalenemethylamine, 3-iodobenzylamine, 2-hydroxybenzylamine, 3-bromobenzyl-amine, 2,6-dichlorobenzylamine, 3,4-dihydro-2H-1,5-benzodioxepin-6-ylmethylamine, 2,3-dihydro-1,4-benzodioxin-6-ylmethylamine, 2,3-dihydro-1,4-benzodioxin-5-ylmethylamine, 1-benzofuran-5-ylmethylamine, 4-(2-thienyl)benzylamine, 3,4-dihydro-2H-1,5-benzo-dioxepin-7-ylmethylamine, 4-morpholinobenzylamine, 4-(1H-pyrazol-1-yl)benzylamine, 4-(4-methylpiperazino)benzylamine, 2-piperidinobenzylamine, 3-(1H-pyrrol-1-yl)benzyl-amine, 2-morpholinobenzylamine, 4-(1H-pyrrol-1-yl)benzylamine, 2-chloro-6-phenoxy benzylamine, 2-(methylthio)benzylamine, 2-(trifluoromethoxy)benzylamine, 2,3-dimethyl-benzylamine, 4-(trifluoromethyl)benzylamine, 3,5-dichlorobenzylamine, 2-(Aminomethyl)-3-fluoroaniline, 3-chloro-4-fluorobenzylamine, 2,5-dimethoxybenzylamine, 2,5-dichloro-benzylamine, 2,6-dimethoxybenzylamine, 2,4-dichloro-6-methylbenzylamine, 3-chloro-4-methylbenzylamine, 4-fluoro-3-(trifluoromethypbenzylamine, 4-fluoro-2-(trifluoromethyl)-benzylamine, 3-piperidin-1-ylmethyl benzylamine, 1-benzothiophen-5-ylmethylamine, 4-(Morpholinomethyl)benzylamine, (3-((4-methylpiperidino)methyl)phenyl)methanamine, (4-Piperidinophenyl)methylamine, (3-piperidinophenyl)methylamine, 142-(4-methyl-piperazin-1-Aphenylynethanamine, (1,4-dimethyl-1,2,3,4-tetrahydroquinoxalin-6-yl)-methylamine, 3-(Trifluoromethoxy)benzylamine, 4-bromo-2-fluorobenzylamine, 2-(1h-pyrazol-1-yl)benzylamine, tert-butyl 4-(2-(aminomethyl)phenyl)piperazine-1-carboxylate, (3-Morpholinophenyl)methylamine, tert-Butyl N-[4-(aminomethyl)phenyl]carbamate, [2-(1H-Pyrrol-1-yl)phenyl]methylamine, 1-[3-(4-Methylpiperazin-1-yl)phenyl]methanamine, [4-(1-Pyrrolidinyl)phenyl]methanamine, (3-pyrrolidin-1-ylphenyl)methylamine, [4-(2-morpholinoethoxy)phenyl]methylamine, [2-(2-Morpholinoethoxy)phenyl]methylamine, [3-(2-Morpholinoethoxy)phenyl]methylamine, [3-(morpholinomethyl)phenyl]methylamine, [4-(piperidinomethyl)phenyl]methylamine, {4-[(4-methylpiperazin-1-yl)methyl]phenyl}-methylamine, [4-(2-furyl)phenyl]methylamine, tert-butyl 4-[4-(aminomethyl)phenyl]tetrahydro-1(2H)-pyrazinecarboxylate, (2,2-dimethyl-2,3-dihydro-1-benzofuran-7-yl)-methylamine, [3-(1H-1,2,4-triazol-1-yl)phenyl]methylamine, (4-thien-3-ylphenyl)methyl-amine, 1-[2-(morpholin-4-ylmethyl)phenyl]methanamine, {2-[(4-methylpiperazin-1-yl)methyl]phenyl}methylamine, [3-(2-furyl)phenyl]methylamine, (3-thien-2-ylphenyl)methyl-amine, [2-(2-furyl)phenyl]methylamine, 4-(pyrrolidin-1-ylmethyl)benzylamine, 4-[(4-methylperhydro-1,4-diazepin-1-yl)methyl]benzylamine, 4-[2-(dimethylamino) ethoxy]-benzylamine, (2-pyrrolidin-1-ylphenyl)methylamine, [3-(1-pyrrolidinylmethyl)phenyl]-methenamine, (3-thien-3-ylphenyl)methylamine, 2-[2-(dimethylamino)ethoxy]benzylamine, 2-(phenoxymethyl)benzylamine, (1-methyl-1H-indol-4-yl)methylamine, 4-(4-methyl-perhydro-1,4-diazepin-1-yl)benzylamine, (1-methyl-1H-indol-6-yl)methylamine, [3-(1,3-thiazol-2-yl)phenyl]methylamine, 3-(1H-pyrazol-1-ylmethyl)benzylamine, (1-methyl-1H-indol-5-yl)methylamine, 3-(phenoxymethyl)benzylamine, 2-morpholino-5-(trifluoromethyl)-benzylamine, [4-(1,3-thiazol-2-yl)phenyl]methylamine, 3-(1-methyl-1H-pyrazol-3-yl)benzyl-amine, 2-(4-methylperhydro-1,4-diazepin-1-yl)benzylamine, 4-[3-(dimethylamino) propoxy]benzylamine, 3-(2-methyl-1H-imidazol-1-yl)benzylamine, 4-(2-methyl-1H-imidazol-1-yl)benzylamine, 2-(2-methyl-1H-imidazol-1-yl)benzylamine, [4-(tetrahydro-pyran-4-yloxy)phenyl]methylamine, 3-[3-(dimethylamino)propoxy]benzylamine, 2-[3-(dimethylamino)propoxy]benzylamine, 3-pyrimidin-2-ylbenzylamine, 4-(1-methyl-1H-pyrazol-3-yl)benzylamine, 3-(1-methyl-1H-pyrazol-5-yl)benzylamine and 1-(1-benzothien-7-yl)methanamine.

Most of these methods make use of a boronic acid, or a pinacol ester thereof, for introducing a substituent at position 6 of the pteridine core structure. For this purpose, suitable aryl-boronic acids include, but are not limited to, the following commercially available materials wherein the aryl group is 3-acetamidophenyl, 4-acetamidophenyl, 4-acetylphenyl, 3-acetylphenyl, 2-acetylphenyl, 5-acetyl-2-chlorophenyl, 4-acetyl-3-fluorophenyl, 5-acetyl-2-fluorophenyl, 4-(4′-allyloxycarbonylpiperazino)phenyl, 3-amino-carbonylphenyl, 4-aminocarbonylphenyl, 2-amino-5-chlorophenyl, 4-amino-3-methoxy-phenyl, 3-aminophenyl, 2-amino-4-methylphenyl, 2-amino-5-methylphenyl, 4-amino-2-methylphenyl, 5-amino-2-methylphenyl, 4-amino-3-nitrophenyl, 3-aminophenyl, 2-aminophenyl, 4-aminophenyl, 4-benzyloxyphenyl, 3-benzyloxyphenyl, 2-benzyloxyphenyl, 4-benzyloxy-2-fluorophenyl, 4-benzyloxy-3-fluorophenyl, 3-benzyloxy-4-methoxyphenyl, 4-biphenyl, 3,5-bis(trifluoromethyl)benzene, 4-bromophenyl, 3-bromophenyl, 4-bromo-2,5-dimethylphenyl, 2-bromo-5-fluorophenyl, 2-bromo-6-fluorophenyl, 4-n-butylphenyl, 4-isobutylphenyl, 4-carboxyphenyl, 3-carboxyphenyl, 2-carboxyphenyl, 2-carboxy-5-fluorophenyl, 4-carboxy-3-fluorophenyl, 4-carboxy-2-chlorophenyl, 5-carboxy-2-chlorophenyl, 4-carboxy-3-chlorophenyl, 3-carboxyphenyl, 3-(3-carboxypropionyl-amino)phenyl, 4-(3-carboxypropionylamino)phenyl, 2-chloro-5-formylphenyl, 3-chloro-4-fluorophenyl, 2-chloro-4-fluorophenyl, 4-chloro-2-fluorophenyl, 3-chloro-4-hydroxy-5-methoxyphenyl, 2-chloro-5-hydroxymethylphenyl, 3-chloro-5-methoxyphenyl, 2-chloro-4-methylphenyl, 2-chloro-5-methylphenyl, 2-chloro-5-trifluoromethoxyphenyl, 3-chloro-5-trifluoromethylphenyl, 4-chloro-2-trifluoromethylphenyl, 4-chlorophenyl, 3-chlorophenyl, 2-chlorophenyl, 4-cyanomethoxyphenyl, 3-cyanomethoxyphenyl, 2-cyanomethoxyphenyl, 4-cyanophenyl, 3-cyanophenyl, 2-cyanophenyl, 3,5-dibromophenyl, 3-(N-cyclopropyl-aminocarbonyl)phenyl, 2,6-dichlorophenyl, 3,4-dichlorophenyl, 2,4-dichlorophenyl, 2,3-dichlorophenyl, 3,5-dichlorophenyl, 3-(N,N-diethylaminocarbonyl)phenyl, 3,5-difluoro-phenyl, 3,5-difluoro-2-methoxyphenyl, 3,4-difluorophenyl, 2,6-difluorophenyl, 2,5-difluorophenyl, 2,4-difluorophenyl, 2,3-difluorophenyl, 4-(N,N-dimethylamino)phenyl, 3-(N,N-dimethylamino)phenyl, 2-(N,N-dimethylamino)phenyl, 3-(N,N-dimethylamino-carbonyl)phenyl, 3-[(N′,N′-dimethylamino)ethylaminocarbonyl]phenyl, 4-[(N′,N′-dimethyl-amino)ethylaminocarbonyl]phenyl, 3,5-dimethylphenyl, 3,4-dimethylphenyl, 2,6-dimethyl-phenyl, 2,6-dimethoxyphenyl, 2,5-dimethoxyphenyl, 2,4-dimethoxyphenyl, 3-[1,3]dioxolan-2-ylmethoxyphenyl, 4-ethoxyphenyl, 2-ethoxyphenyl, 3-(ethoxycarbonyl)methoxyphenyl, 4-(ethoxycarbonyl)methoxyphenyl, 4-ethoxycarbonylphenyl, 3-ethoxycarbonylphenyl, 2-ethoxycarbonylphenyl, 4-(3-ethoxycarbonylpiperidino)carboxamidophenyl, 4-ethylphenyl, 4-fluorophenyl, 3-fluorophenyl, 2-fluorophenyl, 3-fluoro-4-formylphenyl, 4-fluoro-3-formylphenyl, 4-fluoro-2-methylphenyl, 2-fluoro-5-methylphenyl, 2-fluoro-5-methoxy-phenyl, 3-fluoro-4-methoxyphenyl, 5-fluoro-2-methoxycarbonylphenyl, 2-fluoro-4-trifluoro-methylphenyl, 2-formylaminophenyl, 3-formylaminophenyl, 4-formylaminophenyl, 2-formyl-5-methoxyphenyl, 3-formyl-4-methoxyphenyl, 5-formyl-2-methoxyphenyl, 2-formyl-5-methylphenyl, 4-formylphenyl, 3-formylphenyl, 2-formylphenyl, 4-hydroxy-3,5-dimethylphenyl, 3-(2-hydroxyethyl)-aminocarbonylphenyl, 4-(2-hydroxyethyl)amino-carbonylphenyl, 3-hydroxy-4-methoxycarbonylphenyl, 4-hydroxy-3-methoxyphenyl, 4-(hydroxymethyl)phenyl, 3-(hydroxymethyl)phenyl, 4-hydroxy-3-nitrophenyl, 4-hydroxy-phenyl, 3-hydroxyphenyl, 2-hydroxyphenyl, 4-isopropoxyphenyl, 4-(4-isopropylpiper-azinyl)phenyl, 4-isopropylphenyl, 4-methanesulfonamidophenyl, 3-methane-sulfonamidophenyl, 2-methanesulfonamidophenyl, 4-methanesulfonylphenyl, 2-methoxy-5-formylphenyl, 5-methoxy-2-formylphenyl, 4-methoxy-2-formylphenyl, 4-methoxy-carbonylphenyl, 3-methoxycarbonylphenyl, 2-methoxycarbonylphenyl, 3-methoxy-4-methoxycarbonylphenyl, 4-methoxy-3-nitrophenyl, 4-methoxyphenyl, 3-methoxyphenyl, 2-methoxyphenyl, 2-methoxy-5-methylphenyl, 4-N-methylcarboxamidophenyl, 4-methyl-phenyl, 3-methylphenyl, 2-methylphenyl, 4-(N-methylamino)phenyl, 3-(4-methyl-piperazine-1-carbonyl)phenyl, 4-(4-methylpiperazine-1-carbonyl)phenyl, 4-(methylthio)-phenyl, 3-(methylthio)phenyl, 2-(methylthio)phenyl, 4-morpholinophenyl, 4-(morpholino-carbonyl)phenyl, 2-morpholinomethyl)phenyl, 4-nitrophenyl, 3-nitrophenyl, 2-nitrophenyl, 4-phenoxyphenyl, 4-(N-phenylaminomethyl)phenyl, 4-(phenylcarbonyl)phenyl, 4-(piperazine-1-carbonyl)phenyl, 4-piperazinylphenyl, 3-succinamidophenyl, 4-succinamidophenyl, sulfamoylphenyl, 2-(toluene-4-sulfonamido)phenyl, 3-(toluene-4-sulfonamido)phenyl, 4-(toluene-4-sulfonamido)phenyl, 4-(tert-butoxycarbonylamino)-3-methoxyphenyl, 2-(tert-butoxycarbonyl)phenyl, 3-(tert-butoxycarbonyl)phenyl, 4-(tert-butoxycarbonyl)phenyl, 4-tert-butylphenyl, 4-(tetrahydro-2H-pyran-2-yloxy)phenyl, 4-(2-thienyl)phenyl, 4-trifluoromethoxyphenyl, 4-(trimethylammonium)methylphenyl, 2,4,6-trimethylphenyl, 3,4,5-trifluorophenyl, 2,3,4-trifluorophenyl, 3-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 3-trifluoromethoxyphenyl, 2-trifluoromethylphenyl, 3-trifluoro-methylphenyl, 4-trifluoromethylphenyl, 3,4,5-trimethoxyphenyl, 4-vinylphenyl, 6-benzyloxy-2-naphthyl, 1-naphthalyl, 2-naphthalyl, or 1-biphenylyl.

For the purpose of making the compounds of the present invention, suitable heterocyclic-boronic acids or pinacol esters thereof include, but are not limited to, the following commercially available materials wherein the heterocyclic group is 3,4-methylenedioxyphenyl (benzodioxolyl), 2-acetamidopyridin-5-yl, 2-aminopyridin-5-yl, 2-aminopyrimidin-5-yl, 1,4-benzodioxan-6-yl, 2-benzothienyl, 1-benzothiophen-3-yl, 1-benzothiophen-2-yl, 2-benzyloxypyridin-5-yl, 1-benzyl-1H-pyrazol-4-yl, 2-bromo-3-chloropyridin-4-yl, 5-bromo-2,3-dihydrobenzo[b]furan-7-yl, 2-bromo-3-methylpyridin-5-yl, 3-bromopyridin-5-yl, 2-bromopyridin-5-yl, 5-bromothien-2-yl, 2-chloro-6-isopropylpyridin-3-yl, 2-chloro-3-methylpyridin-5-yl, 2-[4-(4-chlorophenylsulfonyl)piperazin-1-yl]pyridin-5-yl, 2-chloropyrid-4-yl, 2-chloropyrid-5-yl, 5-chlorothien-2-yl, dibenzo[b,d]furan-4-yl, 2-chloro-3-fluoropyridin-4-yl, dibenzo[b,d]thien-4-yl, 3,4-dihydro-2H-1,5-benzodioxepin-7-yl, 3,6-dihydro-2H-pyridine-1-tert-butoxycarbonyl, 2,5-dibromo-3-pyridinyl, 2,6-dichloro-pyridin-3-yl, 2,3-dihydro-1-benzofuran-5-yl, 2,6-dimethoxypyridin-5-yl, 2,6-dimethoxypyridin-3-yl, 2,4-dimethoxypyrimidin-5-yl, 3,5-dimethylisoxazol-4-yl, 2-(3-N,N-dimethylaminopropoxy)-pyridin-5-yl, 3,5-dimethylpyrazol-4-yl, 1-[1,3]dioxolan-2-ylmethyl-1H-pyrazol-4-yl, 2,4-dioxo-1,2,3,4-tetrahydro-5-pyrimidinyl, 2,4-di(tert-butoxy)pyrimidin-5-yl, 2-ethoxypyridin-3-yl, 2-fluoro-3-methylpyridin-5-yl, 2-fluoropyridin-3-yl, 2-fluoropyridin-5-yl, 5-formyl-2-furyl, 5-formylthien-2-yl, furan-3-yl, furan-2-yl, 2-hydroxypyridin-5-yl, 5-indolyl, 1-isobutyl-1H-pyrazol-4-yl, isoquinolin-4-yl, 2-methoxypyridin-3-yl, 2-methoxypyrimidin-5-yl, 5-methyl-1-benzothiophen-2-yl, H-pyrazol-5-methylfuran-2-yl, 1-methylindol-5-yl, 5-methyl-3-phenyl-4-isoxazolyl, 5-(methylthio)thien-2-yl, 2-(4-methyl-piperazinyl)pyridin-4-yl, 2-(4-methylpiperazinyl)pyridin-5-yl, 1-methyl-1H-pyrazol-4-yl, 3-methylpyridin-2-yl, 5-methylpyridin-2-yl, 5-methylpyridin-3-yl, 4-methylthien-2-yl, 5-methylthien-2-yl, 2-methoxypyridin-5-yl, 2-(2-morpholinoethylamino)-pyridin-5-yl, 2-(2-morpholinoethyl)-1H-pyrazol-4-yl, 2-(morpholin-1-yl)-pyridin-5-yl, 1-(phenylsulfonyl)-1H-indol-3-yl, 5-phenyl-2-thienyl, 2-(piperazin-1-yl)-pyridin-5-yl, 2-(piperazin-1-yl)-pyridin-4-yl, 1-propyl-1H-pyrazol-4-yl, pyrazol-4-yl, pyridin-4-yl, pyridin-3-yl, pyrimidin-5-yl, 4-phenoxathiinyl, quinolin-8-yl, quinolin-3-yl, 2-(4-tert-butoxycarbonylpiperazinyl)-pyrid-4-yl, 1-tert-butoxycarbonyl-1H-pyrazol-4-yl, 1-tert-butoxycarbonyl-2-pyrrolyl, 1-(tert-butoxy-carbonyl)-5-bromo-1H-indol-2-yl, 1-(tert-butoxycarbonyl)-1H-indol-5-yl, 1-(tert-butoxy-carbonyl)-5-methoxy-1H-indol-2-yl, 1-thianthrenylthien-3-yl, thien-3-yl, thien-2-yl or 1,3,5-trimethyl-1H-pyrazol-4-yl.

In a fifth aspect, the present invention provides certain disubstituted and trisubstituted quinazoline derivatives that may be useful as direct or indirect intermediates in the synthesis of the biologically active disubstituted and trisubstituted quinazoline derivatives according to the first aspect of the invention. Without limitation, this group of intermediates includes quinazoline derivatives selected from the group consisting of:

-   2-amino-6-bromo-4-(2-methoxyethoxy)-quinazoline, -   2-amino-6-bromo-4-(2,2,2-trifluoroethoxy)-quinazoline, -   2-amino-6-bromo-4-isopropoxy-quinazoline, -   2-amino-6-bromo-4-[2-(4-morpholinyl)ethoxy]-quinazoline, -   2-amino-6-bromo-4-(cyclopropyl-methoxy)-quinazoline, -   2-amino-6-bromo-4-ethoxy-quinazoline, -   2-amino-6-bromo-4-cyclopentyloxy-quinazoline, -   4-chloro-6-(3,4-dimethoxyphenyl)-quinazoline, -   4-chloro-6-(4-fluorophenyl)-quinazoline, -   4-chloro-6-(4-acetamidophenyl)-quinazoline, -   4-Benzyloxy-6-bromo-quinazolin-2-ylamine, -   6-Bromo-4-[2-(2-dimethylamino-ethoxy)-ethoxy]-quinazolin-2-ylamine, -   6-Bromo-4-cyclobutylmethoxy-quinazolin-2-ylamine, -   4-(2-Fluoroethoxy)-6-bromo-quinazolin-2-ylamine, -   4-(2-Hydroxyethoxy)-6-bromo-quinazolin-2-ylamine, -   4-(Tetrahydrofuran-2-ylmethoxy)-6-bromo-quinazolin-2-ylamine, -   4-(Tetrahydrofuran-3-yloxy)-6-bromo-quinazolin-2-ylamine, and -   4-(3-Dimethylaminopropoxy)-6-bromo-quinazolin-2-ylamine.

In yet another aspect, the present invention relates to a group of 2,4,6-di- and trisubstituted quinazoline derivatives, as well as pharmaceutical compositions comprising such quinazoline derivatives as a biologically active principle, having the above structural formula (I) and being in the form of a pharmaceutically acceptable salt. The latter include any therapeutically active non-toxic addition salt which compounds having the general formula (I) are able to form with a salt-forming agent. Such addition salts may conveniently be obtained by treating the quinazoline derivatives of the invention with an appropriate salt-forming acid or base. For instance, 2,4,6-di- and trisubstituted quinazoline derivatives having basic properties may be converted into the corresponding therapeutically active, non-toxic acid addition salt form by treating the free base form with a suitable amount of an appropriate acid following conventional procedures. Examples of such appropriate salt-forming acids include, for instance, inorganic acids resulting in forming salts such as but not limited to hydrohalides (e.g. hydrochloride and hydrobromide), sulfate, nitrate, phosphate, diphosphate, carbonate, bicarbonate, and the like; and organic monocarboxylic or dicarboxylic acids resulting in forming salts such as, for example, acetate, propanoate, hydroxyacetate, 2-hydroxypropanoate, 2-oxo-propanoate, lactate, pyruvate, oxalate, malonate, succinate, maleate, fumarate, malate, tartrate, citrate, methanesulfonate, ethanesulfonate, benzoate, 2-hydroxybenzoate, 4-amino-2-hydroxybenzoate, benzenesulfonate, p-toluenesulfonate, salicylate, p-amino-salicylate, pamoate, bitartrate, camphorsulfonate, edetate, 1,2-ethanedisulfonate, fumarate, glucoheptonate, gluconate, glutamate, hexylresorcinate, hydroxynaphthoate, hydroxyethanesulfonate, mandelate, methylsulfate, pantothenate, stearate, as well as salts derived from ethanedioic, propanedioic, butanedioic, (Z)-2-butenedioic, (E)-2-butenedioic, 2-hydroxybutanedioic, 2,3-dihydroxybutane-dioic, 2-hydroxy-1,2,3-propanetricarboxylic and cyclohexanesulfamic acids and the like.

2,4,6-di- and trisubstituted quinazoline derivatives having the structural formula (I) and having acidic properties may be converted in a similar manner into the corresponding therapeutically active, non-toxic base addition salt form. Examples of appropriate salt-forming bases include, for instance, inorganic bases like metallic hydroxides such as but not limited to those of alkali and alkaline-earth metals like calcium, lithium, magnesium, potassium and sodium, or zinc, resulting in the corresponding metal salt; organic bases such as but not limited to ammonia, alkylamines, benzathine, hydrabamine, arginine, lysine, N,N′-dibenzylethylene-diamine, chloroprocaine, choline, diethanolamine, ethylene-diamine, N-methyl-glucamine, procaine and the like.

Reaction conditions for treating the 2,4,6-di- and trisubstituted quinazoline derivatives having the structural formula (I) of this invention with an appropriate salt-forming acid or base are similar to standard conditions involving the same acid or base but different organic compounds with basic or acidic properties, respectively. Preferably, in view of its use in a pharmaceutical composition or in the manufacture of a medicament for treating specific diseases, the pharmaceutically acceptable salt will be designed, i.e. the salt-forming acid or base will be selected so as to impart greater water-solubility, lower toxicity, greater stability and/or slower dissolution rate to the quinazoline derivative of this invention.

The present invention further provides the use of a 2,4,6-di- and trisubstituted quinazoline derivative represented by the structural formula (I), or a pharmaceutically acceptable salt or a solvate thereof or a stereoisomer thereof or a pro-drug form thereof, as a biologically-active ingredient, i.e. active principle, especially as a medicine or for the manufacture of a medicament for the treatment of viral infections, especially due to Flaviridae, and pathologic conditions associated therewith such as, but not limited to, hepatitis C.

The invention further relates to a pharmaceutical composition comprising:

-   (a) one or more 2,4,6-di- and trisubstituted quinazoline derivatives     represented by the structural formula (I), and -   (b) one or more pharmaceutically acceptable carriers.

In another embodiment, this invention provides combinations, preferably synergistic combinations, of one or more 2,4,6-di- and trisubstituted quinazoline derivatives represented by the structural formula (I) with one or more other antiviral agents. As is conventional in the art, the evaluation of a synergistic effect in a drug combination may be made by analyzing the quantification of the interactions between individual drugs, using the median effect principle described by Chou et al. in Adv. Enzyme Reg. (1984) 22:27. Briefly, this principle states that interactions (synergism, additivity, antagonism) between two drugs can be quantified using the combination index (hereinafter referred as CI) defined by the following equation:

${CI}_{x} = {\frac{{ED}_{x}^{1c}}{{ED}_{x}^{1a}} + \frac{{ED}_{x}^{2c}}{{ED}_{x}^{2a}}}$

wherein ED_(x) is the dose of the first or respectively second drug used alone (1a, 2a), or in combination with the second or respectively first drug (1c, 2c), which is needed to produce a given effect. The said first and second drug have synergistic or additive or antagonistic effects depending upon CI<1, CI=1, or CI>1, respectively. As will be explained in more detail herein below, this principle may be applied to a number of desirable effects such as, but not limited to, anti-viral activity against HCV.

The present invention further relates to a pharmaceutical composition or combined preparation having synergistic effects against a viral infection, especially a hepatitis C virus infection, and containing:

-   (a) one or more anti-viral agents, and -   (b) at least one 2,4,6-di- and trisubstituted quinazoline derivative     represented by the structural formula (I), and -   (c) optionally one or more pharmaceutical excipients or     pharmaceutically acceptable carriers,     for simultaneous, separate or sequential use in the treatment of HCV     infection.

Suitable anti-viral agents for inclusion into the synergistic antiviral compo-sitions or combined preparations of this invention include, for instance, retroviral enzyme inhibitors belonging to categories well known in the art, such as HIV-1 IN inhibitors, nucleoside reverse transcriptase inhibitors (e.g. zidovudine, lamivudine, didanosine, stavudine, zalcitabine and the like), non-nucleoside reverse transcriptase inhibitors (e.g. nevirapine, delavirdine and the like), other reverse transcriptase inhibitors (e.g. foscamet sodium and the like), and HIV-1 protease inhibitors (e.g. saquinavir, ritonavir, indinavir, nelfinavir and the like). Other suitable antiviral agents include for instance acemannan, acyclovir, adefovir, alovudine, alvircept, amantadine, aranotin, arildone, atevirdine, pyridine, cidofovir, cipamfylline, cytarabine, desciclovir, disoxaril, edoxudine, enviradene, enviroxime, famciclovir, famotine, fiacitabine, fialuridine, floxuridine, fosarilate, fosfonet, ganciclovir, idoxuridine, kethoxal, lobucavir, memotine, methisazone, penciclovir, pirodavir, somantadine, sorivudine, tilorone, trifluridine, valaciclovir, vidarabine, viroxime, zinviroxime, moroxydine, podophyllotoxin, ribavirine, rimantadine, stallimycine, statolon, tromantadine and xenazoic acid, and their pharmaceutically acceptable salts.

Especially relevant to this aspect of the invention is the inhibition of the replication of hepatitis C virus, in particular in human beings. Therefore, of particular relevance in the context of HCV prevention or treatment is co-administration with one or more other agents aiming at HCV inhibition well known in the art, such as but not limited to, (pegylated) interferon alpha, ribavirin, an NS3 protease inhibitor (such as telaprivir), or nucleoside- or non-nucleoside-based inhibitors of NS5B polymerase. Synergistic activity of the pharmaceutical compositions or combined preparations of this invention against viral infection may be readily determined by means of one or more tests such as, but not limited to, the isobologram method, as previously described by Elion et al. in J. Biol. Chem. (1954) 208:477-488 and by Baba et al. in Antimicrob. Agents Chemother. (1984) 25:515-517, using EC₅₀ for calculating the fractional inhibitory concentration (hereinafter referred as FIC). When the minimum FIC index corresponding to the FIC of combined compounds (e.g., FIC_(x)+FIC_(y)) is equal to 1.0, the combination is said to be additive; when it is between 1.0 and 0.5, the combination is defined as sub-synergistic, and when it is lower than 0.5, the combination is by defined as synergistic. When the minimum FIC index is between 1.0 and 2.0, the combination is defined as subantagonistic and, when it is higher than 2.0, the combination is defined as antagonistic.

The pharmaceutical composition or combined preparation with synergistic activity against viral infection according to this invention may contain the 2,4,6-di- and trisubstituted quinazoline derivative having the structural formula (I) over a broad content range depending on the contemplated use and the expected effect of the preparation. Generally, the 2,4,6-di- and trisubstituted quinazoline derivative content of the combined preparation is within the range of from 0.1 to 99.9% by weight, preferably from 1 to 99% by weight, more preferably from about 5 to 95% by weight.

The pharmaceutical compositions and combined preparations according to this invention may be administered orally or in any other suitable fashion. Oral administration is preferred and the preparation may have the form of a tablet, aqueous dispersion, dispersable powder or granule, emulsion, hard or soft capsule, syrup, elixir or gel. The dosing forms may, be prepared using any method known in the art for manufacturing these pharmaceutical compositions and may comprise as additives sweeteners, flavoring agents, coloring agents, preservatives and the like. Carrier materials and excipients are detailed herein below and may include, inter alia, calcium carbonate, sodium carbonate, lactose, calcium phosphate or sodium phosphate; granulating and disintegrating agents, binding agents and the like. The pharmaceutical composition or combined preparation of this invention may be included in a gelatin capsule mixed with any inert solid diluent or carrier material, or has the form of a soft gelatin capsule, in which the ingredient is mixed with a water or oil medium. Aqueous dispersions may comprise the biologically active composition or combined preparation in combination with a suspending agent, dispersing agent or wetting agent. Oil dispersions may comprise suspending agents such as a vegetable oil. Rectal administration is also applicable, for instance in the form of suppositories or gels. Injection (e.g. intramuscularly or intraperiteneously) is also applicable as a mode of administration, for instance in the form of injectable solutions or dispersions, depending upon the disorder to be treated and the condition of the patient.

The term “pharmaceutically acceptable carrier or excipient” as used herein in relation to pharmaceutical compositions and combined preparations means any material or substance with which the active principle, i.e. the 2,4,6-di- and trisubstituted quinazoline derivative having the general formula (I), and optionally the one or more other antiviral agents, may be formulated in order to facilitate its application or dissemination to the locus to be treated, for instance by dissolving, dispersing or diffusing the said composition, and/or to facilitate its storage, transport or handling without impairing its effectiveness. The pharmaceutically acceptable carrier may be a solid or a liquid or a gas which has been compressed to form a liquid, i.e. the compositions of this invention can suitably be used as concentrates, emulsions, solutions, granulates, dusts, sprays, aerosols, pellets or powders.

Suitable pharmaceutical carriers for use in the said pharmaceutical compo-sitions and their formulation are well known to those skilled in the art. There is no particular restriction to their selection within the present invention although, due to the usually low or very low water-solubility of the quinazoline derivatives of this invention, special attention will be paid to the selection of suitable carrier combinations that can assist in properly formulating them in view of the expected time release profile. Suitable pharmaceutical carriers include additives such as wetting agents, dispersing agents, stickers, adhesives, emulsifying or surface-active agents, thickening agents, complexing agents, gelling agents, solvents, coatings, antibacterial and antifungal agents (for example phenol, sorbic acid, chlorobutanol), isotonic agents (such as sugars or sodium chloride) and the like, provided the same are consistent with pharmaceutical practice, i.e. carriers and additives which do not create permanent damage to mammals.

The pharmaceutical compositions of the present invention may be prepared in any known manner, for instance by homogeneously mixing, dissolving, spray-drying, coating and/or grinding the active ingredients, in a one-step or a multi-steps procedure, with the selected carrier material and, where appropriate, the other additives such as surface-active agents. may also be prepared by micronisation, for instance in view to obtain them in the form of microspheres usually having a diameter of about 1 to 10 μm, namely for the manufacture of microcapsules for controlled or sustained release of the biologically active ingredient(s).

Suitable surface-active agents to be used in the pharmaceutical compositions of the present invention are non-ionic, cationic and/or anionic surfactants having good emulsifying, dispersing and/or wetting properties. Suitable anionic surfactants include both water-soluble soaps and water-soluble synthetic surface-active agents. Suitable soaps are alkaline or alkaline-earth metal salts, unsubstituted or substituted ammonium salts of higher fatty acids (C₁₀-C₂₂), e.g. the sodium or potassium salts of oleic or stearic acid, or of natural fatty acid mixtures obtainable form coconut oil or tallow oil. Synthetic surfactants include sodium or calcium salts of polyacrylic acids; fatty sulphonates and sulphates; sulphonated benzimidazole derivatives and alkylarylsulphonates. Fatty sulphonates or sulphates are usually in the form of alkaline or alkaline-earth metal salts, unsubstituted ammonium salts or ammonium salts substituted with an alkyl or acyl radical having from 8 to 22 carbon atoms, e.g. the sodium or calcium salt of lignosulphonic acid or dodecylsulphonic acid or a mixture of fatty alcohol sulphates obtained from natural fatty acids, alkaline or alkaline-earth metal salts of sulphuric or sulphonic acid esters (such as sodium lauryl sulphate) and sulphonic acids of fatty alcohol/ethylene oxide adducts. Suitable sulphonated benzimidazole derivatives preferably contain 8 to 22 carbon atoms. Examples of alkylarylsulphonates are the sodium, calcium or alkanolamine salts of dodecylbenzene sulphonic acid or dibutyl-naphthalenesulphonic acid or a naphthalenesulphonic acid/formaldehyde condensation product. Also suitable are the corresponding phosphates, e.g. salts of phosphoric acid ester and an adduct of p-nonylphenol with ethylene and/or propylene oxide, or phospholipids. Suitable phospholipids for this purpose are the natural (originating from animal or plant cells) or synthetic phospholipids of the cephalin or lecithin type such as e.g. phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerine, lysolecithin, cardiolipin, dioctanylphosphatidylcholine, dipalmitoylphoshatidylcholine and their mixtures.

Suitable non-ionic surfactants include polyethoxylated and polypropoxylated derivatives of alkylphenols, fatty alcohols, fatty acids, aliphatic amines or amides containing at least 12 carbon atoms in the molecule, alkylarenesuiphonates and dialkylsulphosuccinates, such as polyglycol ether derivatives of aliphatic and cycloaliphatic alcohols, saturated and unsaturated fatty acids and alkylphenols, said derivatives preferably containing 3 to 10 glycol ether groups and 8 to 20 carbon atoms in the (aliphatic) hydrocarbon moiety and 6 to 18 carbon atoms in the alkyl moiety of the alkylphenol. Further suitable non-ionic surfactants are water-soluble adducts of polyethylene oxide with polypropylene glycol, ethylenediamino-polypropylene glycol containing 1 to 10 carbon atoms in the alkyl chain, which adducts contain 20 to 250 ethyleneglycol ether groups and/or 10 to 100 propyleneglycol ether groups. Such compounds usually contain from 1 to 5 ethyleneglycol units per propyleneglycol unit. Representative examples of non-ionic surfactants are nonylphenol-polyethoxyethanol, castor oil polyglycolic ethers, polypropylene/polyethylene oxide adducts, tributylphenoxypolyethoxyethanol, polyethyleneglycol and octylphenoxypolyethoxyethanol. Fatty acid esters of polyethylene sorbitan (such as polyoxyethylene sorbitan trioleate), glycerol, sorbitan, sucrose and pentaerythritol are also suitable non-ionic surfactants.

Suitable cationic surfactants include quaternary ammonium salts, preferably halides, having four hydrocarbon radicals optionally substituted with halo, phenyl, substituted phenyl or hydroxy; for instance quaternary ammonium salts containing as N-substituent at least one C₈-C₂₂ alkyl radical (e.g. cetyl, lauryl, palmityl, myristyl, oleyl and the like) and, as further sub-stituents, unsubstituted or halogenated lower alkyl, benzyl and/or hydroxy-C₁₋₄ alkyl radicals.

A more detailed description of surface-active agents suitable for this purpose may be found for instance in “McCutcheon's Detergents and Emulsifiers Annual” (MC Publishing Crop., Ridgewood, N.J., 1981), “Tensid-Taschenbuch”, 2^(nd) ed. (Hanser Verlag, Vienna, 1981) and “Encyclopaedia of Surfactants (Chemical Publishing Co., New York, 1981).

Structure-forming, thickening or gel-forming agents may be included into the pharmaceutical compositions and combined preparations of the invention. Suitable such agents are in particular highly dispersed silicic acid, such as the product commercially available under the trade name Aerosil; bentonites; tetraalkyl ammonium salts of montmorillonites (e.g., products commercially available under the trade name Bentone), wherein each of the alkyl groups may contain from 1 to 20 carbon atoms; cetostearyl alcohol and modified castor oil products (e.g. the product commercially available under the trade name Antisettle).

Gelling agents which may be included into the pharmaceutical compositions and combined preparations of the present invention include, but are not limited to, cellulose derivatives such as carboxymethylcellulose, cellulose acetate and the like; natural gums such as arabic gum, xanthum gum, tragacanth gum, guar gum and the like; gelatin; silicon dioxide; synthetic polymers such as carbomers, and mixtures thereof. Gelatin and modified celluloses represent a preferred class of gelling agents.

Other optional excipients which may be included in the pharmaceutical compositions and combined preparations of the present invention include additives such as magnesium oxide; azo dyes; organic and inorganic pigments such as titanium dioxide; UV-absorbers; stabilisers; odor masking agents; viscosity enhancers; antioxidants such as, for example, ascorbyl palmitate, sodium bisulfite, sodium metabisulfite and the like, and mixtures thereof; preservatives such as, for example, potassium sorbate, sodium benzoate, sorbic acid, propyl gallate, benzylalcohol, methyl paraben, propyl paraben and the like; sequestering agents such as ethylene-diamine tetraacetic acid; flavoring agents such as natural vanillin; buffers such as citric acid and acetic acid; extenders or bulking agents such as silicates, diatomaceous earth, magnesium oxide or aluminum oxide; densification agents such as magnesium salts; and mixtures thereof.

Additional ingredients may be included in order to control the duration of action of the biologically-active ingredient in the compositions and combined preparations of the invention. Control release compositions may thus be achieved by selecting appropriate polymer carriers such as for example polyesters, polyamino-acids, polyvinyl-pyrrolidone, ethylene-vinyl acetate copolymers, methylcellulose, carboxy-methylcellulose, protamine sulfate and the like. The rate of drug release and duration of action may also be controlled by incorporating the active ingredient into particles, e.g. microcapsules, of a polymeric substance such as hydrogels, polylactic acid, hydroxymethyl-cellulose, polymethyl methacrylate and the other above-described polymers. Such methods include colloid drug delivery systems like liposomes, microspheres, microemulsions, nanoparticles, nanocapsules and so on. Depending on the route of administration, the pharmaceutical composition or combined preparation of the invention may also require protective coatings.

Pharmaceutical forms suitable for injectable use include sterile aqueous solutions or dispersions and sterile powders for the extemporaneous preparation thereof. Typical carriers for this purpose therefore include biocompatible aqueous buffers, ethanol, glycerol, propylene glycol, polyethylene glycol, complexing agents such as cyclodextrins and the like, and mixtures thereof.

Other modes of local drug administration can also be used. For example, the selected active agent may be administered topically, in an ointment, gel or the like, or transdermally, using a conventional transdermal drug delivery system.

Since, in the case of combined preparations including the 2,4,6-di- and trisubstituted quinazoline derivative of this invention and one or more other antiviral agents, both ingredients do not necessarily bring out their synergistic therapeutic effect directly at the same time in the patient to be treated, the said combined preparation may be in the form of a medical kit or package containing the two ingredients in separate but adjacent form. In the latter context, each ingredient may therefore be formulated in a way suitable for an administration route different from that of the other ingredient, e.g. one of them may be in the form of an oral or parenteral formulation whereas the other is in the form of an ampoule for intravenous injection or an aerosol.

The present invention further relates to a method for treating hepatitis C in a patient, preferably a mammal, more preferably a human being. The method of this invention consists of administering to the patient in need thereof an effective amount of a 2,4,6-di- and trisubstituted quinazoline derivative having the general formula (I), optionally together with an effective amount of one or more other antiviral agents, or a pharmaceutical composition comprising the same, such as disclosed above in extensive details.

The therapeutically effective amount of a 2,4,6-di- or trisubstituted quinazoline derivative having the structural formula (I) is usually in the range of about 0.01 mg to 20 mg, preferably about 0.1 mg to 5 mg, per day per kg bodyweight for humans. Depending upon the pathologic condition to be treated and the patient's condition, the said effective amount may be divided into several sub-units per day or may be administered at more than one day intervals. The patient to be treated may be any warm-blooded animal, preferably a mammal, more preferably a human being, suffering from said pathologic condition.

The present invention will be further described with reference to certain more specific embodiments and examples, but the present invention is not limited thereto but only by the attached claims. The following examples are given by way of illustration only.

Example 1 Synthesis of 2-amino-4-hydroxy-6-bromo-quinazoline

This compound may be made by any of the following methods:

Method A

This method has been described by O′Hara et al. in J. Org. Chem. (1991) 56, 776-785. A solution consisting of 2-amino-5-bromobenzoic acid (8.64 g, 40 mmol), cyanamide (2.52 g, 60 mmol) and concentrated hydrochloric acid (3 ml) in absolute ethanol (100 ml) was refluxed for 6 hours. At 1 h intervals, 0.5 ml concentrated hydrochloric acid was added to the reaction mixture. After cooling to room temperature, the precipitate was collected by filtration, washed with ethanol yielding the title compound as a white solid (3.5 g, yield: 36%).

Method B

A mixture of 2-amino-5-bromobenzoic acid (5.4 g, 25 mmol), chloro-formamidine hydrochloride (5.75 g, 50 mmol), sulfolane (1 ml) and dimethylsulfone (12 g) was heated at 165° C. for 30 minutes. Then, water (100 ml) was added to the reaction mixture and the pH was adjusted to 7-8 by the addition of a 33% aqueous ammonia solution in water. The precipitate was collected by filtration, washed with water and dried over P₂O₅, yielding the title compound as a yellowish solid (5.7 g, yield: 95%) which was characterized by its mass spectrum as follows: MS (m/z): 240 ([M+H]⁺, 100).

Example 2 Synthesis of 6-bromo-4-hydroxy-quinazoline

A suspension of 2-amino-5-bromobenzoic acid (5.4 g, 25 mmol) in formamide (40 ml) was heated at 165° C. for 6 hours. After cooling to room temperature, water (100 ml) was added to the reaction mixture. The precipitate was collected by filtration, washed with water and dried over P₂O₅, yielding the title compound as a white solid (5.3 g, yield: 95%) which was characterized by its mass spectrum as follows: MS (m/z): 225 ([M+H]⁺, 100).

Example 3 Synthesis of 6-chloro-2,4-diamino-quinazoline

A mixture of 2-amino-5-chlorobenzonitrile (1.07 g, 7.0 mmol), chloro-formamidine hydrochloride (1.6 g, 14 mmol), sulfolane (0.5 ml) and dimethylsulfone (3 g) was heated at 165° C. for 30 minutes. Then, water (30 ml) was added to the reaction mixture. The pH was adjusted to 7-8 by the addition of a 33% aqueous ammonia solution in water. The precipitate was collected by filtration, washed with water and dried over P₂O₅, yielding the title compound as a yellowish solid (1.35 g, yield: 99%) which was characterized by its mass spectrum as follows: MS (m/z): 195 ([M+H]⁺, 100).

Example 4 Synthesis of 4-amino-6-chloro-quinazoline

A solution of 2-amino-5-chlorobenzonitrile (1.07 g, 7.0 mmol) in formamide (20 ml) was heated at 180° C. for 6 hours. After cooling to room temperature, water (30 ml) was added to the reaction mixture. The precipitate was collected by filtration, washed with water and dried over P₂O₅, yielding the title compound as a grey solid (1.2 g, yield: 95%) which was characterized by its mass spectrum as follows: MS (m/z): 180 ([M+H]⁺, 100).

Example 5 Synthesis of 2-amino-6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline

A mixture of the compound of example 1 (2.4 g, 10 mmol), 3,4-dimethoxyphenylboronic acid (1.82 g, 10 mmol), K₂CO₃ (4.15 g, 30 mmol) and tetrakis(triphenylphosphine)palladium(0) (0.5 g, 0.43 mmol) in dioxane (150 ml) and water (50 ml) was heated under reflux till the starting materials disappeared on TLC. After cooling to room temperature, the reaction mixture was neutralized with acetic acid till pH 6-7. The precipitate was collected by filtration, washed with water and diethyl ether to afford the title compound as a grey solid (3.0 g, yield: 90%). The crude product was used in the following step without further purification and was characterized by its mass spectrum as follows: MS (m/z): 298 ([M+H]⁺, 100).

Example 6 Synthesis of 2-amino-6-(4-fluorophenyl)-4-hydroxy-quinazoline

This compound, obtained from 4-fluorophenylboronic acid in 90% yield using the same procedure as in example 5, was characterized by its mass spectrum as follows: MS (m/z): 256 ([M+H]⁺, 100).

Example 7 Synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline

A mixture of 6-bromo-4-hydroxy-quinazoline (2.4 g, 10 mmol), 4-fluoro-phenylboronic acid (1.54 g, 11 mmol), K₂CO₃ (4.15 g, 30 mmol) and tetrakis(triphenylphosphine)palladium(0) (0.5 g, 0.43 mmol) in dioxane (150 ml) and water (50 ml) was heated under reflux for 12 hours. After cooling to room temperature, the reaction mixture was neutralized with acetic acid to pH 6-7. The precipitate was collected by filtration, washed with water and diethyl ether to yield the crude product. The crude residue was purified by silica gel flash chromatography, the mobile phase being a mixture of methanol and dichloromethane (in a ratio of 1:40), yielding the pure title compound as a white solid (2.15 g, yield: 95%) which was characterized by its mass spectrum as follows: MS (m/z): 241 ([M+H]⁺, 100).

Example 8 Synthesis of 2-acetamido-6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline

A suspension of crude 2-amino-6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline (3.0 g, 10 mmol) in acetic anhydride (20 ml) was refluxed for 40 minutes. After concentration under reduced pressure, the residue was purified by silica gel flash chromatography, the mobile phase being a mixture of methanol and dichloromethane (in a ratio of 1:40), yielding the title compound as a white solid (3.05 g, yield: 90%) which was characterized by its mass spectrum as follows: MS (m/z): 340 ([M+H]⁺, 100).

Example 9 Synthesis of 2-acetamido-6-bromo-4-hydroxy-quinazoline

This compound, synthesized from 2-amino-6-bromo-4-hydroxy-quinazoline in 85% yield using the procedure as in example 8, was characterized by its mass spectrum as follows: MS (m/z): 282 ([M+H]⁺, 100).

Example 10 Synthesis of 2-acetamido-6-(4-fluorophenyl)-4-hydroxy-quinazoline

This compound, prepared from 2-amino-6-(4-fluorophenyl)-4-hydroxy-quinazoline in 95% yield using the same procedure as in example 8, was characterized by its mass spectrum as follows: MS (m/z): 298 ([M+H]⁺, 100).

Example 11 Synthesis of 2-acetamido-6-bromo-4-(1,2,4-triazolyl)-quinazoline

To a mixture of 2-acetamido-6-bromo-4-hydroxy-quinazoline (2.82 g, 10 mmol) and 1,2,4-triazole (6.9 g, 100 mmol) in acetonitrile (100 ml) was added diisopropylethylamine (3.5 ml, 30 mmol) and POCl₃ (2.8 ml, 30 mmol). The mixture was stirred at room temperature for 12 hours. The precipitate was collected, washed with ethanol, diethylether, and dried over P₂O₅ in a vacuum dessicator to yield the title compound as yellow solid (3.3 g). The crude product was used in the following reaction without further purification and was characterized by its mass spectrum as follows: MS (m/z): 333 ([M+H]⁺, 100).

Example 12 Synthesis of 2-acetamido-6-(3,4-dimethoxyphenyl)-4-(1,2,4-triazolyl)-quinazoline

This compound, synthesized from 2-acetamido-6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline, using the same procedure as in example 11, was characterized by its mass spectrum as follows: MS (m/z): 391 ([M+H]⁺, 100).

Example 13 Synthesis of 2-acetamido-6-(4-fluorophenyl)-4-(1,2,4-triazolyl)-quinazoline

This compound, synthesized from 2-acetamido-6-(4-fluorophenyl)-4-hydroxy-quinazoline using the same procedure as in example 11, was characterized by its mass spectrum as follows: MS (m/z): 349 ([M+H]⁺, 100).

Example 14 Synthesis of 2-amino-6-bromo-4-(2-methoxyethoxy)-quinazoline

To 2-methoxyethanol (10 ml) was added NaH (80 mg of a 60% dispersion in mineral oil, 2.0 mmol). The mixture was stirred at room temperature for 10 minutes. Then, 2-acetamido-6-bromo-4-(1,2,4-triazolyl)-quinazoline (167 mg, 0.5 mmol) was added to this solution. The resulting mixture was stirred at room temperature for 30 minutes and then heated at 80° C. for 2 hours. The solvents were evaporated in vacuo and the crude residue was purified by silica gel flash chromatography, the mobile phase being a mixture of methanol and dichloromethane (in a ratio of 1:80), yielding the title compound as a white solid (140 mg, yield: 94%) which was characterized by its mass spectrum as follows: MS (m/z): 298 ([M+H]⁺, 100).

Example 15 Synthesis of 2-amino-6-bromo-4-(2,2,2-trifluoroethoxy)-quinazoline

This compound, obtained from 2-acetamido-6-bromo-4-(1,2,4-triazolyl)-quinazoline and 2,2,2-trifluoroethanol in 85% yield using the same procedure as in example 14, was characterized by its mass spectrum as follows: MS (m/z): 322 ([M+H]⁺, 100).

Example 16 Synthesis of 2-amino-6-bromo-4-isopropoxy-quinazoline

This compound, obtained from 2-acetamido-6-bromo-4-(1,2,4-triazolyl)-quinazoline and isopropanol in 86% yield, using the same procedure as in example 14, was characterized by its mass spectrum as follows: MS (m/z): 282 ([M+H]⁺, 100).

Example 17 Synthesis of 2-amino-6-bromo-4-[2-(4-morpholinyl)ethoxy]-quinazoline

This compound, obtained from 2-acetamido-6-bromo-4-(1,2,4-triazolyl)-quinazoline and N-(2-hydroxyethyl)morpholine in 78% yield, using the same procedure as in example 14, was characterized by its mass spectrum as follows: MS (m/z): 353 ([M+H]⁺, 100)

Example 18 Synthesis of 2-amino-6-(3,4-dimethoxyphenyl)-4-isopropoxy-quinazoline

To isopropanol (10 ml) was added NaH (80 mg of a 60% dispersion in mineral oil, 2.0 mmol). The mixture was stirred at room temperature for 10 minutes. Then, 2-acetamido-6-(3,4-dimethoxyphenyl)-4-(1,2,4-triazolyl)-quinazoline (195 mg, 0.5 mmol) was added. The resulting mixture was stirred at room temperature for another 20 minutes and then heated at 80° C. for 2 hours. The solvents were evaporated in vacuo and the crude residue was purified by silica gel flash chromatography, the mobile phase being a mixture of isopropanol/dichloromethane (in a volume ratio of 1:50), yielding the title compound (140 mg, yield: 82%) as a white solid was characterized by its mass spectrum as follows: MS (m/z): 340 ([M+H]⁺, 100).

Example 19 Synthesis of 2-amino-4-ethoxy-6-(4-fluorophenyl)-quinazoline

This compound, synthesized from 2-acetamido-6-(4-fluorophenyl)-4-(1,2,4-triazolyl)-quinazoline and ethanol in 90% yield using the same procedure as in example 18, was characterized by its mass spectrum as follows: MS (m/z): 284 ([M+H]⁺, 100).

Example 20 Synthesis of 2-amino-6-(4-fluorophenyl)-4-(2-methoxyethoxy)-quinazoline

This compound, synthesized from 2-acetamido-6-(4-fluorophenyl)-4-(1,2,4-triazolyl)-quinazoline and 2-methoxyethanol in 84% yield using the same procedure as in example 18, was characterized by its mass spectrum as follows: MS (m/z): 299 ([M+H]⁺, 100).

Example 21 Synthesis of 2-amino-6-(4-fluorophenyl)-4-isopropoxy-quinazoline

This compound, synthesized from 2-acetamido-6-(4-fluorophenyl)-4-(1,2,4-triazolyl)-quinazoline and isopropanol in 85% yield using the same procedure as in example 18, was characterized by its mass spectrum as follows: MS (m/z): 283 ([M+H]⁺, 100).

Example 22 Synthesis of 2-amino-6-bromo-4-(cyclopropylmethoxy)-quinazoline

This compound, obtained from 2-acetamido-6-bromo-4-(1,2,4-triazolyl)-quinazoline and cyclopropanemethanol in 85% yield using the same procedure as in example 18, was characterized by its mass spectrum as follows: MS (m/z): 294 ([M+H]⁺, 100).

Example 23 Synthesis of 2-amino-6-bromo-4-ethoxy-quinazoline

This compound, obtained from 2-acetamido-6-bromo-4-(1,2,4-triazolyl)-quinazoline and ethanol in 93% yield using the same procedure as in example 18, was characterized by its mass spectrum as follows: MS (m/z): 283 ([M+H]⁺, 100).

Example 24 Synthesis of 2-amino-6-(4-fluorophenyl)-4-(cyclopropyl-methoxy)-quinazoline

This compound, prepared from 2-amino-6-bromo-4-(cyclopropylmethoxy)-quinazoline and 4-fluorophenylboronic acid in 97% yield, using the procedure described for the synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 310 ([M₊H]⁺, 100).

Example 25 Synthesis of 2-amino-6-(4-fluorophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline

This compound, obtained from 2-amino-6-bromo-4-[2-(4-morpholinyl)ethoxy]-quinazoline and 4-fluorophenylboronic acid in 64% yield, using the procedure described for the synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 369 ([M+H]⁺, 100).

Example 26 Synthesis of 2-amino-6-(4-fluorophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline

This compound, obtained from 2-amino-6-bromo-4-(2,2,2-trifluoroethoxy)-quinazoline and 4-fluorophenylboronic acid in 89% yield, using the procedure described for the synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 338 ([M+H]⁺, 100).

Example 27 Synthesis of 2-amino-6-(4-acetamidophenyl)-4-isopropoxy-quinazoline

This compound, synthesized from 2-amino-6-bromo-4-isopropoxy-quinazoline and 4-acetamido-phenylboronic acid in 84% yield as a white solid using the procedure described for the synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 298 ([M+H]⁺, 100).

Example 28 Synthesis of 2-amino-6-(4-acetamidophenyl)-4-(2-methoxyethoxy)-quinazoline

This compound, obtained from 2-amino-6-bromo-4-(2-methoxyethoxy)-quinazoline and 4-acetamido-phenylboronic acid in 66% yield, using the procedure described for the synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 353 ([M+H]⁺, 100).

Example 29 Synthesis of 2-amino-6-(4-acetamidophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline

This compound, obtained from 2-amino-6-bromo-4-[2-(4-morpholinyl)ethoxy]-quinazoline and 4-acetamidophenylboronic acid in 82% yield using the procedure described for the synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 408 ([M+H]⁺, 100).

Example 30 Synthesis of 2-amino-6-(4-acetamidophenyl)-4-ethoxy-quinazoline

This compound, obtained from 2-amino-6-bromo-4-ethoxy-quinazoline and 4-acetamido-phenylboronic acid in 93% yield using the procedure described for the synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 323 ([M+H]⁺, 100).

Example 31 Synthesis of 2-amino-6-(4-acetamidophenyl)-4-(cyclopropyl-methoxy)-quinazoline

This compound, synthesized from 2-amino-6-bromo-4-(cyclopropyl-methoxy)-quinazoline and 4-acetamido-phenylboronic acid in 86% yield using the procedure described for the synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 349 ([M+H]⁺, 100).

Example 32 Synthesis of 2-amino-6-(4-acetamidophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline

This compound, synthesized from 2-amino-6-bromo-4-(2,2,2-trifluoro-ethoxy)-quinazoline and 4-acetamido-phenylboronic acid in 82% yield using the procedure described for the synthesis of 6-(4-fluorophenyl)-4-hydroxy-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 377 ([M+H]⁺, 100)

Example 33 Synthesis of 4-CHLORO-6-(4-FLUOROPHENYL)-QUINAZOLINE

To a suspension of 4-hydroxy-6-(4-fluorophenyl)-quinazoline (720 mg, 3 mmol) in toluene (20 ml) was added diisopropylethylamine (1.5 ml, 9 mmol) and POCl₃ (0.84 ml, 9 mmol). The mixture was refluxed for 1 hour. The solvents were evaporated in vacuo. The residue was redissolved in dichloromethane and the organic layer was washed with ice water till pH 6-7. The combined organic layers were dried over MgSO₄ and concentrated to yield the title compound as a yellow solid (700 mg, yield: 90%) was characterized by its mass spectrum as follows: MS (m/z): 259 ([M+H]⁺, 100).

Example 34 Synthesis of 4-ethoxy-6-(4-fluorophenyl)-quinazoline

To absolute ethanol (10 ml) was added NaH (80 mg of a 60% dispersion in mineral oil, 2.0 mmol). The mixture was stirred at room temperature for 10 minutes. Then, 4-chloro-6-(4-fluorophenyl)-quinazoline (52 mg, 0.2 mmol) was added to this solution. The resulting mixture was stirred at room temperature for another 30 minutes. The solvents were evaporated in vacuo and the crude residue was purified by silica gel flash chromatography, the mobile phase being a mixture of ethanol and dichloromethane in a volume ratio of 1:100), yielding the title compound as a white solid (46 mg, yield: 88%) was characterized by its mass spectrum as follows: MS (m/z): 269 ([M+H]⁺, 100).

Example 35 Synthesis of 4-(2-methoxyethoxy)-6-(4-fluorophenyl)-quinazoline

This compound, obtained from 4-chloro-6-(4-fluorophenyl)-quinazoline and 2-methoxy-ethanol in 73% yield using the procedure described for the synthesis of 4-ethoxy-6-(4-fluorophenyl)-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 299 ([M+H]⁺, 100).

Example 36 Synthesis of 4-benzyloxy-6-(4-fluorophenyl)-quinazoline

This compound, obtained from 4-chloro-6-(4-fluorophenyl)-quinazoline and benzyl alcohol in 76% yield using the procedure described for the synthesis of 4-ethoxy-6-(4-fluorophenyl)-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 331 ([M+H]⁺, 100).

Example 37 Synthesis of 4-butoxy-6-(4-fluorophenyl)-quinazoline

This compound, obtained from 4-chloro-6-(4-fluorophenyl)-quinazoline and n-butanol in 92% yield using the procedure described for the synthesis of 4-ethoxy-6-(4-fluorophenyl)-quinazoline, was characterized by its mass spectrum as follows: MS (m/z): 297 ([M+H]⁺, 100).

In the following, the synthesized compounds are characterized by Mass spectral data and HPLC retention times. The HPLC retention times are reported based on or using the following chromatographic conditions:

Method A Column: 50×4.6 mm Packing: Synergi 4μ Polar RP 80A Detection: UV 254 and 270 nM

Temperature: ambient

Eluents: start time duration Flow Water + ACN + (min.) (min.) μl/min 0.1% TFA 0.1% TFA 0 3 3000 98 2 3.0 1.5 3000 2 98 4.5 .1 3000 98 2 4.51 .89 3000 98 2

Method B Column: 3×2 mm Packing: Synergi 4μ Polar RP 80A Detection: UV 254 and 280 nM

Temperature: ambient

Eluents: start time duration Flow Water + 1% MeOH + 1% (min) (min) ul/min Acetic acid Acetic acid 0 0.1 2000 100 0 0.1 2.5 2000 0 100 2.6 0.5 2000 0 100 3.1 0.1 2000 100 0 3.2 0.4 2000 100 0

Starting materials for further examples described below were synthesized as follows:

-   -   4-Benzyloxy-6-bromo-quinazolin-2-ylamine was prepared by a         method analogous to example 14, using benzyl alcohol instead of         2-methoxyethanol. The resulting compound was characterized as         follows: MS (m/z): 330 ([M+H]⁺, 100); HPLC R_(t) 1.57 min         (Method B).     -   6-Bromo-4-[2-(2-dimethylamino-ethoxy)-ethoxy]-quinazolin-2-ylamine         was prepared by a method analogous to example 14, using         2-(2-dimethylamino-ethoxy)-ethanol instead of 2-methoxyethanol.         The resulting compound was characterized as follows: MS (m/z):         371 ([M+H]⁺, 100); HPLC R_(t) 0.63 minutes (Method B).     -   6-Bromo-4-cyclobutylmethoxy-quinazolin-2-ylamine was prepared by         a method analogous to example 14, cyclobutylmethanol instead of         2-methoxyethanol. The resulting compound was characterized as         follows: MS (m/z): 308 ([M+H]⁺, 100); HPLC R_(t) 1.48 minutes         (Method B).     -   4-(2-Fluoroethoxy)-6-bromo-quinazolin-2-ylamine was prepared by         a method analogous to example 14, using 2-fluoroethanol instead         of 2-methoxyethanol. The resulting compound was characterized as         follows: MS (m/z): 286 ([M+H]⁺, 100); HPLC R_(t) 1.17 minutes         (Method B). 4-(2-Hydroxyethoxy)-6-bromo-quinazolin-2-ylamine was         generated as a by-product in this reaction.     -   4-(Tetrahydrofuran-2-ylmethoxy)-6-bromo-quinazolin-2-ylamine was         prepared by a method analogous to example 14, using         (tetrahydro-furan-2-yl)-methanol instead of 2-methoxyethanol.         The resulting compound was characterized as follows: MS (m/z):         323 ([M+H]⁺, 100); HPLC R_(t) 1.3 minutes (Method B).     -   4-(Tetrahydrofuran-3-yloxy)-6-bromo-quinazolin-2-ylamine was         prepared by a method analogous to example 14, using         tetrahydrofuran-3-ol instead of 2-methoxyethanol. The resulting         compound was characterized as follows: MS (m/z): 310 ([M+H]⁺,         100); HPLC R_(t) 1.28 minutes (Method B).     -   4-(3-Dimethylaminopropoxy)-6-bromo-quinazolin-2-ylamine was         prepared by a method analogous to example 14, using         3-dimethylaminopropanol instead of 2-methoxyethanol. The         resulting compound was characterized as follows: MS (m/z): 3.25         ([M+H]⁺, 100); HPLC R_(t) 0.53 minutes (Method B).

Boronic acids, or esters thereof, for use in the synthesis of examples below were purchased, or synthesized as follows:

N-(2-Pyrrolidin-1-yl-ethyl)-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzamide

To a solution of 4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzoic acid (248.1 mg, 1 mmol), EDC (191.7 mg, 1 mmol) and HOBt (135.1 mg, 1 mmol) in DCM (3 mL), was added diisopropylethylamine (DIEA) (0.26 ml, 1.5 mmol). After stirring vigorously for 0.5 hours, 2-pyrrolidin-1-yl-ethylamine (0.15 ml, 1.2 mmol) was added. The mixture was stirred overnight, diluted with EtOAc (20 ml) and washed twice with brine. The organic layer was dried with sodium sulfate and concentrated to provide the crude product (230 mg, 66.8% yield), which used without further purification.

In the same manner, analogous boronate esters were synthesized using 2-pyrrolidin-1-yl-propylamine (77% yield), 2-(1-Methyl-pyrrolidin-2-yl)-ethylamine(74% yield), 1,1-Dimethyl-2-morpholin-4-yl-ethylamine (72% yield), 1,1-dimethyl-2-pyrrolidin-1-yl-ethylamine (74% yield), 1-isopropyl-piperidin-4-ylamine (68% yield) and 1-Amino-cyclopropanecarbonitrile (65% yield).

2-Fluoro-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzenesulfonyl chloride

A solution of NaNO₂ (145 mg, 2.12 mmol) in H₂O (0.3 ml) was added dropwise over 3 minutes to a precooled (0° C.) solution of 2-Fluoro-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenylamine (455 mg, 1.92 mmol) in concentrated aqueous HCl (0.7 ml) and glacial acetic acid (2 ml) with vigorous stirring. The resulting mixture was removed from the ice bath and allowed to warm for 15 minutes before re-cooling to 0° C. Meanwhile, a blue-green solution of CuCl₂ (67.2 mg, 0.5 mmol) in 0.2 ml of H₂O was added in one portion to a saturated solution of SO₂ in glacial acetic acid (1.7 ml) at 0° C. with vigorous stirring to produce an opaque milky-green mixture. This was carefully added to the stirred diazo solution at 0° C. to produce a dark mixture with the evolution of gas. The reaction was removed from ice bath and warmed to room temperature for 1 hour before being poured into a beaker of stirred ice/water (10 ml). The grey solid was collected by filtration, washed with water (2×10 ml) and dried overnight in vacuo to give the sulfonyl chloride (430 mg, 81%). Ammonia (0.5M in dioxane, 5 equivalents) was added and the mixture was stirred overnight. Following concentration the residue was dissolved in ethyl acetate, washed with brine and evaporated. The resulting crude sulfonamide (400 mg, 85% yield) was used without further purification.

Examples 38-225

The following compounds were synthesized using procedures analogous to those described for example 24, using the starting materials shown in table 1.

TABLE 1 MS HPLC R_(t) Example Name Starting material (m/z) (minutes) 38 6-(2,3-Difluorophenyl)-4- 6-bromo-4-ethoxy- 302 [M + H]⁺ 2.76 ethoxy-quinazolin-2- quinazolin-2-ylamine (Method A) ylamine 39 4-Ethoxy-6-p-tolyl- 6-bromo-4-ethoxy- 280 [M + H]⁺ 2.78 quinazolin-2-ylamine quinazolin-2-ylamine (Method A) 40 4-Ethoxy-6-furan-3-yl- 6-bromo-4-ethoxy- 256 [M + H]⁺ 2.58 quinazolin-2-ylamine quinazolin-2-ylamine (Method A) 41 4-Ethoxy-6-(2H-pyrazol-3- 6-bromo-4-ethoxy- 256 ([M + H]⁺ 2.21 yl)-quinazolin-2-ylamine quinazolin-2-ylamine (Method A) 42 4-Ethoxy-6-thiophen-2-yl- 6-bromo-4-ethoxy- 272 [M + H]⁺ 2.69 quinazolin-2-ylamine quinazolin-2-ylamine (Method A) 43 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 323 [M + H]⁺ 2.33 quinazolin-6-yl)-N-methyl- quinazolin-2-ylamine (Method A) benzamide 44 4-Ethoxy-6-furan-2-yl- 6-bromo-4-ethoxy- 256 [M + H]⁺ 2.61 quinazolin-2-ylamine quinazolin-2-ylamine (Method A) 45 4-Ethoxy-6-thiophen-3-yl- 6-bromo-4-ethoxy- 272 [M + H]⁺ 2.73 quinazolin-2-ylamine quinazolin-2-ylamine (Method A) 46 6-(3,4-Difluoro-phenyl)-4- 6-bromo-4-ethoxy- 302 [M + H]⁺ 2.72 ethoxy-quinazolin-2- quinazolin-2-ylamine (Method A) ylamine 47 3-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 291 [M + H]⁺ 2.65 quinazolin-6-yl)- quinazolin-2-ylamine (Method A) benzonitrile 48 4-Ethoxy-6-(2H-pyrazol-4- 6-bromo-4-ethoxy- 256 ([M + H]⁺ 2.15 yl)-quinazolin-2-ylamine quinazolin-2-ylamine (Method A) 49 6-(4-Amino-phenyl)-4- 6-bromo-4-ethoxy- 281 [M + H]⁺ 2.00 ethoxy-quinazolin-2- quinazolin-2-ylamine (Method A) ylamine 50 4-Ethoxy-6-(2,3,4-trifluoro- 6-bromo-4-ethoxy- 320 [M + H]⁺ 2.8  phenyl)-quinazolin-2- quinazolin-2-ylamine (Method A) ylamine 51 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 281 [M + H]⁺ 2.44 quinazolin-6-yl)-phenol quinazolin-2-ylamine (Method A) 52 6-(2,3-Difluoro-phenyl)-4- 6-bromo-4-(2- 332 [M + H]⁺ 2.64 (2-methoxy-ethoxy)- methoxy-ethoxy)- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 53 4-(2-Methoxy-ethoxy)-6-(2- 6-bromo-4-(2- 364 [M + H]⁺ 2.73 trifluoromethyl-phenyl)- methoxy-ethoxy)- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 54 6-(5-Chloro-thiophen-2-yl)- 6-bromo-4-(2- 337 [M + H]⁺ 2.72 4-(2-methoxy-ethoxy)- methoxy-ethoxy)- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 55 4-(2-Methoxy-ethoxy)-6-p- 6-bromo-4-(2- 310 [M + H]⁺ 2.70 tolyl-quinazolin-2-ylamine methoxy-ethoxy)- (Method A) quinazolin-2-ylamine 56 6-Benzo[b]thiophen-2-yl-4- 6-bromo-4-(2- 352 [M + H]⁺ 2.82 (2-methoxy-ethoxy)- methoxy-ethoxy)- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 57 6-Benzofuran-2-yl-4-(2- 6-bromo-4-(2- 336 [M + H]⁺ 2.76 methoxy-ethoxy)- methoxy-ethoxy)- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 58 4-(2-Methoxy-ethoxy)-6- 6-bromo-4-(2- 302 [M + H]⁺ 2.57 thiophen-2-yl-quinazolin-2- methoxy-ethoxy)- (Method A) ylamine quinazolin-2-ylamine 59 4-(2-Amino-4-(2-methoxy- 6-bromo-4-(2- 353 [M + H]⁺ 2.24 ethoxy)-quinazolin-6-yl)-N- methoxy-ethoxy)- (Method A) methyl-benzamide quinazolin-2-ylamine 60 4-(2-Methoxy-ethoxy)-6- 6-bromo-4-(2- 286 [M + H]⁺ 2.50 furan-2-yl-quinazolin-2- methoxy-ethoxy)- (Method A) ylamine quinazolin-2-ylamine 61 4-(2-Methoxy-ethoxy)-6- 6-bromo-4-(2- 302 [M + H]⁺ 2.56 thiophen-3-yl-quinazolin-2- methoxy-ethoxy)- (Method A) ylamine quinazolin-2-ylamine 62 6-(3,4-Difluoro-phenyl)-4- 6-bromo-4-(2- 332 [M + H]⁺ 2.66 (2-methoxy-ethoxy)- methoxy-ethoxy)- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 63 3-(2-Amino-4-(2-methoxy- 6-bromo-4-(2- 321 [M + H]⁺ 2.53 ethoxy)-quinazolin-6-yl)- methoxy-ethoxy)- (Method A) benzonitrile quinazolin-2-ylamine 64 4-(2-Methoxy-ethoxy)-6- 6-bromo-4-(2- 286 [M + H]⁺ 2.07 (2H-pyrazol-4-yl)- methoxy-ethoxy)- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 65 6-(4-Amino-phenyl)-4-(2- 6-bromo-4-(2- 311 [M + H]⁺ 1.89 methoxy-ethoxy)- methoxy-ethoxy)- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 66 4-(2-Methoxy-ethoxy)-6- 6-bromo-4-(2- 350 [M + H]⁺ 2.70 (2,3,4-trifluoro-phenyl)- methoxy-ethoxy)- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 67 6-(4-Fluoro-2-methyl- 6-bromo-4-(2- 328 [M + H]⁺ 2.72 phenyl)-4-(2-methoxy- methoxy-ethoxy)- (Method A) ethoxy)-quinazolin-2- quinazolin-2-ylamine ylamine 68 4-[2-Amino-4-(2-methoxy- 6-bromo-4-(2- 312 [M + H]⁺ 2.31 ethoxy)-quinazolin-6-yl]- methoxy-ethoxy)- (Method A) phenol quinazolin-2-ylamine 69 6-(4-Chloro-3- 6-bromo-4-(2- 399 [M + H]⁺ 2.87 trifluoromethyl-phenyl)-4- methoxy-ethoxy)- (Method A) (2-methoxy-ethoxy)- quinazolin-2-ylamine quinazolin-2-ylamine 70 4-Benzyloxy-6-(2H- 4-benzyloxy-6-bromo- 318 [M + H]⁺ 2.53 pyrazol-3-yl)-quinazolin-2- quinazolin-2-ylamine (Method A) ylamine 71 4-(2-Amino-4-benzyloxy- 4-benzyloxy-6-bromo- 385 [M + H]⁺ 2.63 quinazolin-6-yl)-N-methyl- quinazolin-2-ylamine (Method A) benzamide 72 4-benzyloxy-6-(1H-pyrazol- 4-benzyloxy-6-bromo- 318 [M + H]⁺ 2.49 4-yl)-quinazolin-2-ylamine quinazolin-2-ylamine (Method A) 73 4-[2-(2-Dimethylamino- 6-bromo-4-[2-(2- 437 [M + H]⁺ 2.47 ethoxy)-ethoxy]-6-(4- dimethylamino- (Method A) trifluoromethoxy-phenyl)- ethoxy)-ethoxy]- quinazolin-2-ylamine quinazolin-2-ylamine 74 6-(2,4-Difluoro-phenyl)-4- 6-bromo-4- 316 [M + H]⁺ 2.85 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 75 6-(2,3-Difluorophenyl)-4- 6-bromo-4- 316 [M + H]⁺ 2.85 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 76 4-Isopropoxy-6-(3- 6-bromo-4- 348 [M + H]⁺ 2.93 trifluoromethyl-phenyl)- isopropoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 77 4-Isopropoxy-6-(2- 6-bromo-4- 348 [M + H]⁺ 2.90 trifluoromethyl-phenyl)- isopropoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 78 4-Isopropoxy-6-(4-chloro- 6-bromo-4- 315 [M + H]⁺ 2.93 phenyl)-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 79 4-Isopropoxy-6-p-tolyl- 6-bromo-4- 294 [M + H]⁺ 2.90 quinazolin-2-ylamine isopropoxy- (Method A) quinazolin-2-ylamine 80 6-(2,4-Dichloro-phenyl)-4- 6-bromo-4- 349 [M + H]⁺ 3.02 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 81 6-(2-Chloro-4-fluoro- 6-bromo-4- 333 [M + H]⁺ 2.91 phenyl)-4-isopropoxy- isopropoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 82 6-(3-Chloro-phenyl)-4- 6-bromo-4- 315 [M + H]⁺ 2.91 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 83 6-Benzo[b]thiophen-2-yl-4- 6-bromo-4- 336 [M + H]⁺ 3.01 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 84 6-Furan-3-yl-4-isopropoxy- 6-bromo-4- 270 [M + H]⁺ 2.69 quinazolin-2-ylamine isopropoxy- (Method A) quinazolin-2-ylamine 85 4-Isopropoxy-6-(2H- 6-bromo-4- 270 [M + H]⁺ 2.32 pyrazol-3-yl)-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 86 6-Benzofuran-2-yl-4- 6-bromo-4- 320 [M + H]⁺ 2.94 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 87 4-(2-Amino-4-isopropoxy- 6-bromo-4- 337 [M + H]⁺ 2.45 quinazolin-6-yl)-N-methyl- isopropoxy- (Method A) benzamide quinazolin-2-ylamine 88 6-Furan-2-yl-4-isopropoxy- 6-bromo-4- 270 [M + H]⁺ 2.72 quinazolin-2-ylamine isopropoxy- (Method A) quinazolin-2-ylamine 89 4-Isopropoxy-6-thiophen-3- 6-bromo-4- 286 [M + H]⁺ 2.79 yl-quinazolin-2-ylamine isopropoxy- (Method A) quinazolin-2-ylamine 90 4-Isopropoxy-6-pyridin-3- 6-bromo-4- 281 [M + H]⁺ 1.97 yl-quinazolin-2-ylamine isopropoxy- (Method A) quinazolin-2-ylamine 91 6-(3,4-Difluoro-phenyl)-4- 6-bromo-4- 316 [M + H]⁺ 2.86 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 92 4-Isopropoxy-6-pyridin-4- 6-bromo-4- 281 [M + H]⁺ 1.94 yl-quinazolin-2-ylamine isopropoxy- (Method A) quinazolin-2-ylamine 93 3-(2-Amino-4-isopropoxy- 6-bromo-4- 305 [M + H]⁺ 2.74 quinazolin-6-yl)- isopropoxy- (Method A) benzonitrile quinazolin-2-ylamine 94 6-(3,5-Difluoro-phenyl)-4- 6-bromo-4- 316 [M + H]⁺ 2.70 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 95 4-Isopropoxy-6-(4- 6-bromo-4- 364 [M + H]⁺ 2.81 trifluoromethoxy-phenyl)- isopropoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 96 6-(4-Amino-phenyl)-4- 6-bromo-4- 295 [M + H]⁺ 0.86 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 97 4-Isopropoxy-6-(2,3,4- 6-bromo-4- 334 [M + H]⁺ 2.72 trifluoro-phenyl)-quinazolin- isopropoxy- (Method A) 2-ylamine quinazolin-2-ylamine 98 6-(2-Benzyloxy-phenyl)-4- 6-bromo-4- 387 [M + H]⁺ 2.92 isopropoxy-quinazolin-2- isopropoxy- (Method A) ylamine quinazolin-2-ylamine 99 4-(2-Amino-4-isopropoxy- 6-bromo-4- 305 [M + H]⁺ 2.61 quinazolin-6-yl)- isopropoxy- (Method A) benzonitrile quinazolin-2-ylamine 100 4-(2-Amino-4-isopropoxy- 6-bromo-4- 296 [M + H]⁺ 2.45 quinazolin-6-yl)-phenol isopropoxy- (Method A) quinazolin-2-ylamine 101 4-Isopropoxy-6-quinolin-3- 6-bromo-4- 331 [M + H]⁺ 2.32 yl-quinazolin-2-ylamine isopropoxy- (Method A) quinazolin-2-ylamine 102 4-Cyclobutylmethoxy-6- 6-bromo-4- 342 [M + H]⁺ 2.98 (2,4-difluoro-phenyl)- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 103 4-Cyclobutylmethoxy-6-(4- 6-bromo-4- 324 [M + H]⁺ 2.97 fluoro-phenyl)-quinazolin- cyclobutylmethoxy- (Method A) 2-ylamine quinazolin-2-ylamine 104 4-Cyclobutylmethoxy-6- 6-bromo-4- 342 [M + H]⁺ 2.97 (2,3-difluoro-phenyl)- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 105 4-Cyclobutylmethoxy-6-o- 6-bromo-4- 320 [M + H]⁺ 3.03 tolyl-quinazolin-2-ylamine cyclobutylmethoxy- (Method A) quinazolin-2-ylamine 106 4-Cyclobutylmethoxy-6-(3- 6-bromo-4- 374 [M + H]⁺ 3.06 trifluoromethyl-phenyl)- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 107 4-Cyclobutylmethoxy-6-p- 6-bromo-4- 320 [M + H]⁺ 3.04 tolyl-quinazolin-2-ylamine cyclobutylmethoxy- (Method A) quinazolin-2-ylamine 108 4-Cyclobutylmethoxy-6- 6-bromo-4- 375 [M + H]⁺ 3.18 (2,4-dichloro-phenyl)- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 109 4-Cyclobutylmethoxy-6-(4- 6-bromo-4- 350 [M + H]⁺ 3.06 ethoxy-phenyl)-quinazolin- cyclobutylmethoxy- (Method A) 2-ylamine quinazolin-2-ylamine 110 4-Cyclobutylmethoxy-6-(2- 6-bromo-4- 359 [M + H]⁺ 3.04 chloro-4-fluoro-phenyl)- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 111 4-Cyclobutylmethoxy-6- 6-bromo-4- 296 [M + H]⁺ 2.85 furan-3-yl-quinazolin-2- cyclobutylmethoxy- (Method A) ylamine quinazolin-2-ylamine 112 4-Cyclobutylmethoxy-6-(3- 6-bromo-4- 359 [M + H]⁺ 3.07 chloro-4-fluoro-phenyl)- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 113 4-Cyclobutylmethoxy-6- 6-bromo-4- 296 [M + H]⁺ 2.50 (2H-pyrazol-3-yl)- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 114 6-Benzofuran-2-yl-4- 6-bromo-4- 346 [M + H]⁺ 3.09 cyclobutylmethoxy- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 115 4-(2-amino-4-cyclobutyl- 6-bromo-4- 363 [M + H]⁺ 2.60 methoxy-quinazolin-6-yl)- cyclobutylmethoxy- (Method A) N-methyl-benzamide quinazolin-2-ylamine 116 4-Cyclobutylmethoxy-6- 6-bromo-4- 296 [M + H]⁺ 2.87 furan-2-yl-quinazolin-2- cyclobutylmethoxy- (Method A) ylamine quinazolin-2-ylamine 117 4-Cyclobutylmethoxy-6- 6-bromo-4- 312 [M + H]⁺ 2.94 thiophen-3-yl-quinazolin-2- cyclobutylmethoxy- (Method A) ylamine quinazolin-2-ylamine 118 4-Cyclobutylmethoxy-6- 6-bromo-4- 307 [M + H]⁺ 2.99 pyridin-3-yl-quinazolin-2- cyclobutylmethoxy- (Method A) ylamine quinazolin-2-ylamine 119 3-(2-Amino-4- 6-bromo-4- 331 [M + H]⁺ 2.89 cyclobutylmethoxy- cyclobutylmethoxy- (Method A) quinazolin-6-yl)- quinazolin-2-ylamine benzonitrile 120 4-Cyclobutylmethoxy-6- 6-bromo-4- 296 [M + H]⁺ 2.47 (2H-pyrazol-4-yl)- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 121 4-Cyclobutylmethoxy-6- 6-bromo-4- 360 [M + H]⁺ 3.00 (2,3,4-trifluoro-phenyl)- cyclobutylmethoxy- (Method A) quinazolin-2-ylamine quinazolin-2-ylamine 122 4-(2-Amino-4- 6-bromo-4- 331 [M + H]⁺ 2.88 cyclobutylmethoxy- cyclobutylmethoxy- (Method A) quinazolin-6-yl)- quinazolin-2-ylamine benzonitrile 123 4-(2-amino-4-cyclobutyl- 6-bromo-4- 322 [M + H]⁺ 2.65 methoxyquinazolin-6-yl)- cyclobutylmethoxy- (Method A) phenol quinazolin-2-ylamine 124 6-(2-chloro-4-trifluoro- 6-bromo-4- 409 [M + H]⁺ 3.16 methylphenyl)-4-cyclo- cyclobutylmethoxy- (Method A) butylmethoxyquinazolin-2- quinazolin-2-ylamine ylamine 125 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 337 [M + H]⁺ 2.45 quinazolin-6-yl)-N,N- quinazolin-2-ylamine (Method A) dimethyl-benzamide 126 [4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 363 [M + H]⁺ 2.57 quinazolin-6-yl)-phenyl]- quinazolin-2-ylamine (Method A) pyrrolidin-1-yl-methanone 127 4-(2-Amino-4-isopropoxy- 6-bromo-4- 351 [M + H]⁺ 2.54 quinazolin-6-yl)-N,N- isopropoxy- (Method A) dimethyl-benzamide quinazolin-2-ylamine 128 [4-(2-Amino-4-isopropoxy- 6-bromo-4- 394 [M + H]⁺ 2.51 quinazolin-6-yl)-phenyl]- isopropoxy- (Method A) morpholin-4-yl-methanone quinazolin-2-ylamine 129 4-(2-amino-4-cyclopropyl- 6-bromo-4- 426 [M + H]⁺ 2.84 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-benzyl-benzamide quinazolin-2-ylamine 130 4-(2-amino-4-cyclopropyl- 6-bromo-4- 392 [M + H]⁺ 2.75 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) quinazolin-2-ylamine N-isobutyl-benzamide 131 4-(2-amino-4-cyclopropyl- 6-bromo-4- 418 [M + H]⁺ 2.87 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-cyclohexyl-benzamide quinazolin-2-ylamine 132 4-(2-amino-4-cyclopropyl- 6-bromo-4- 392 [M + H]⁺ 2.77 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-butyl-benzamide quinazolin-2-ylamine 133 4-(2-amino-4-cyclopropyl- 6-bromo-4- 392 [M + H]⁺ 2.79 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-tert-butyl-benzamide quinazolin-2-ylamine 134 4-(2-amino-4-cyclopropyl- 6-bromo-4- 404 [M + H]⁺ 2.81 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-cyclopentyl-benzamide quinazolin-2-ylamine 135 4-(2-amino-4-cyclopropyl- 6-bromo-4- 378 [M + H]⁺ 2.67 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-isopropyl-benzamide quinazolin-2-ylamine 136 4-(2-amino-4-cyclopropy)- 6-bromo-4- 365 [M + H]⁺ 2.44 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-methoxy-benzamide quinazolin-2-ylamine 137 4-(2-amino-4-cyclopropyl- 6-bromo-4- 416 [M + H]⁺ 2.74 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-furan-2-ylmethyl- quinazolin-2-ylamine benzamide 138 4-(2-amino-4-cyclopropyl- 6-bromo-4- 407 [M + H]⁺ 2.23 methoxyquinazolin-6-yl)-N- cyclopropylmethoxy- (Method A) (2-dimethylamino-ethyl)- quinazolin-2-ylamine benzamide 139 4-(2-amino-4-cyclopropyl- 6-bromo-4- 413 [M + H]⁺ 2.41 methoxyquinazolin-6-yl)-N- cyclopropylmethoxy- (Method A) pyridin-2-yl-benzamide quinazolin-2-ylamine 140 4-(2-amino-4-cyclopropyl- 6-bromo-4- 430 [M + H]⁺ 2.89 methoxyquinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-(4-fluorophenyl)- quinazolin-2-ylamine benzamide 141 4-(2-amino-4-cyclopropyl- 6-bromo-4- 421 [M + H]⁺ 2.44 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-(4,5-dihydro-thiazol-2- quinazolin-2-ylamine yl)-benzamide 142 4-(2-amino-4-cyclopropyl- 6-bromo-4- 384 [M + H]⁺ 2.55 methoxy-quinazolin-6-yl)-2- cyclopropylmethoxy- (Method A) chloro-N-methyl- quinazolin-2-ylamine benzamide 143 4-(2-amino-4-cyclopropyl- 6-bromo-4- 410 [M + H]⁺ 2.66 methoxy-quinazolin-6-yl)-2- cyclopropylmethoxy- (Method A) chloro-N-cyclopropyl- quinazolin-2-ylamine benzamide 144 4-(2-amino-4-cyclopropyl- 6-bromo-4- 308 [M + H]⁺ 2.57 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) phenol quinazolin-2-ylamine 145 3-(2-amino-4-cyclopropyl- 6-bromo-4- 308 [M + H]⁺ 2.61 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) phenol quinazolin-2-ylamine 146 4-(2-amino-4-cyclopropyl- 6-bromo-4- 375 [M + H]⁺ 2.61 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-cyclopropyl-benzamide quinazolin-2-ylamine 147 3-(2-amino-4-cyclopropyl- 6-bromo-4- 349 [M + H]⁺ 2.53 methoxy-quinazolin-6-yl)- cyclopropylmethoxy- (Method A) N-methyl-benzamide quinazolin-2-ylamine 148 [4-(2-amino-4-ethoxy- 6-bromo-4-ethoxy- 378 [M + H]⁺ 2.66 quinazolin-6-yl)-pheny]- quinazolin-2-ylamine (Method A) piperidin-1-yl-methanone 149 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 400 [M + H]⁺ 2.73 quinazolin-6-yl)-N-benzyl- quinazolin-2-ylamine (Method A) benzamide 150 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 365 [M + H]⁺ 2.62 quinazolin-6-yl)-N-isobutyl- quinazolin-2-ylamine (Method A) benzamide 151 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 392 [M + H]⁺ 2.76 quinazolin-6-yl)-N- quinazolin-2-ylamine (Method A) cyclohexyl-benzamide 152 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 365 [M + H]⁺ 2.65 quinazolin-6-yl)-N-butyl- quinazolin-2-ylamine (Method A) benzamide 153 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 365 [M + H]⁺ 2.66 quinazolin-6-yl)-N-tert- quinazolin-2-ylamine (Method A) butyl-benzamide 154 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 378 [M + H]⁺ 2.68 quinazolin-6-yl)-N- quinazolin-2-ylamine (Method A) cyclopentyl-benzamide 155 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 351 [M + H]⁺ 2.54 quinazolin-6-yl)-N- quinazolin-2-ylamine (Method A) isopropyl-benzamide 156 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 339 [M + H]⁺ 2.30 quinazolin-6-yl)-N- quinazolin-2-ylamine (Method A) methoxy-benzamide 157 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 389 [M + H]⁺ 2.62 quinazolin-6-yl)-N-furan-2- quinazolin-2-ylamine (Method A) ylmethyl-benzamide 158 [4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 382 [M + H]⁺ 2.60 quinazolin-6-yl)-phenyl]- quinazolin-2-ylamine (Method A) thiazolidin-3-yl-methanone 159 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 381 [M + H]⁺ 2.11 quinazolin-6-yl)-N-(2- quinazolin-2-ylamine (Method A) dimethylaminoethyl)- benzamide 160 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 386 [M + H]⁺ 2.28 quinazolin-6-yl)-N-pyridin- quinazolin-2-ylamine (Method A) 2-yl-benzamide 161 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 403 [M + H]⁺ 2.79 quinazolin-6-yl)-N-(4- quinazolin-2-ylamine (Method A) fluoro-phenyl)-benzamide 162 [4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 396 [M + H]⁺ 2.63 quinazolin-6-yl)-phenyl]- quinazolin-2-ylamine (Method A) thiomorpholin-4-yl- methanone 163 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 395 [M + H]⁺ 2.32 quinazolin-6-yl)-N-(4,5- quinazolin-2-ylamine (Method A) dihydro-thiazol-2-yl)- benzamide 164 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 358 [M + H]⁺ 2.41 quinazolin-6-yl)-2-chloro-N- quinazolin-2-ylamine (Method A) methyl-benzamide 165 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 384 [M + H]⁺ 2.53 quinazolin-6-yl)-2-chloro-N- quinazolin-2-ylamine (Method A) cyclopropyl-benzamide 166 3-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 282 [M + H]⁺ 2.49 quinazolin-6-yl)-phenol quinazolin-2-ylamine (Method A) 167 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 349 [M + H]⁺ 2.48 quinazolin-6-yl)-N- quinazolin-2-ylamine (Method A) cyclopropyl-benzamide 168 3-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 323 [M + H]⁺ 2.39 quinazolin-6-yl)-N-methyl- quinazolin-2-ylamine (Method A) benzamide 169 [4-(2-Amino-4-isopropoxy- 6-bromo-4- 392 [M + H]⁺ 2.73 quinazolin-6-yl)-phenyl]- isopropoxy- (Method A) piperidin-1-yl-methanone quinazolin-2-ylamine 170 4-(2-Amino-4-isopropoxy- 6-bromo-4- 414 [M + H]⁺ 2.80 quinazolin-6-yl)-N-benzyl- isopropoxy- (Method A) benzamide quinazolin-2-ylamine 171 4-(2-Amino-4-isopropoxy- 6-bromo-4- 380 [M + H]⁺ 2.71 quinazolin-6-yl)-N-isobutyl- isopropoxy- (Method A) benzamide quinazolin-2-ylamine 172 4-(2-Amino-4-isopropoxy- 6-bromo-4- 406 [M + H]⁺ 2.91 quinazolin-6-yl)-N- isopropoxy- (Method A) cyclohexyl-benzamide quinazolin-2-ylamine 173 4-(2-Amino-4-isopropoxy- 6-bromo-4- 380 [M + H]⁺ 2.73 quinazolin-6-yl)-N-butyl- isopropoxy- (Method A) benzamide quinazolin-2-ylamine 174 4-(2-Amino-4-isopropoxy- 6-bromo-4- 380 [M + H]⁺ 2.74 quinazolin-6-yl)-N-tert- isopropoxy- (Method A) butyl-benzamide quinazolin-2-ylamine 175 4-(2-Amino-4-isopropoxy- 6-bromo-4- 392 [M + H]⁺ 2.76 quinazolin-6-yl)-N- isopropoxy- (Method A) cyclopentyl-benzamide quinazolin-2-ylamine 176 4-(2-Amino-4-isopropoxy- 6-bromo-4- 365 [M + H]⁺ 2.62 quinazolin-6-yl)-N- isopropoxy- (Method A) isopropyl-benzamide quinazolin-2-ylamine 177 4-(2-Amino-4-isopropoxy- 6-bromo-4- 353 [M + H]⁺ 2.39 quinazolin-6-yl)-N- isopropoxy- (Method A) methoxy-benzamide quinazolin-2-ylamine 178 4-(2-Amino-4-isopropoxy- 6-bromo-4- 395 [M + H]⁺ 2.18 quinazolin-6-yl)-N-(2- isopropoxy- (Method A) dimethylamino-ethyl)- quinazolin-2-ylamine benzamide 179 4-(2-Amino-4-isopropoxy- 6-bromo-4- 417 [M + H]⁺ 2.86 quinazolin-6-yl)-N-(4- isopropoxy- (Method A) fluoro-phenyl)-benzamide quinazolin-2-ylamine 180 [4-(2-Amino-4-isopropoxy- 6-bromo-4- 410 [M + H]⁺ 2.71 quinazolin-6-yl)-phenyl]- isopropoxy- (Method A) thiomorpholin-4-yl- quinazolin-2-ylamine methanone 181 4-(2-Amino-4-isopropoxy- 6-bromo-4- 409 [M + H]⁺ 2.40 quinazolin-6-yl)-N-(4,5- isopropoxy- (Method A) dihydro-thiazol-2-yl)- quinazolin-2-ylamine benzamide 182 4-(2-Amino-4-isopropoxy- 6-bromo-4- 372 [M + H]⁺ 2.50 quinazolin-6-yl)-2-chloro-N- isopropoxy- (Method A) methyl-benzamide quinazolin-2-ylamine 183 4-(2-Amino-4-isopropoxy- 6-bromo-4- 398 [M + H]⁺ 2.61 quinazolin-6-yl)-2-chloro-N- isopropoxy- (Method A) cyclopropyl-benzamide quinazolin-2-ylamine 184 3-(2-Amino-4-isopropoxy- 6-bromo-4- 296 [M + H]⁺ 2.57 quinazolin-6-yl)-phenol isopropoxy- (Method A) quinazolin-2-ylamine 185 4-(2-Amino-4-isopropoxy- 6-bromo-4- 363 [M + H]⁺ 2.55 quinazolin-6-yl)-N- isopropoxy- (Method A) cyclopropyl-benzamide quinazolin-2-ylamine 186 3-(2-Amino-4-isopropoxy- 6-bromo-4- 337 [M + H]⁺ 2.46 quinazolin-6-yl)-N-methyl- isopropoxy- (Method A) benzamide quinazolin-2-ylamine 187 4-Ethoxy-6-[4-(5-methyl- 6-bromo-4-ethoxy- 347 [M + H]⁺ 2.59 [1,3,4]oxadiazol-2-yl)- quinazolin-2-ylamine (Method A) phenyl]-quinazolin-2- ylamine 188 4-[2-Amino-4-(2-hydroxy- 4-(2-hydroxyethoxy)- 381 [M + H]⁺ 2.41 ethoxy)-quinazolin-6-yl]-N- 6-bromo-quinazolin-2- (Method A) isobutyl-benzamide ylamine 189 4-[2-Amino-4-(2-hydroxy- 4-(2-hydroxyethoxy)- 392 [M + H]⁺ 2.47 ethoxy)-quinazolin-6-yl]-N- 6-bromo-quinazolin-2- (Method A) cyclopentyl-benzamide ylamine 190 4-[2-Amino-4-(2-hydroxy- 4-(2-hydroxyethoxy)- 367 [M + H]⁺ 2.31 ethoxy)-quinazolin-6-yl]-N- 6-bromo-quinazolin-2- (Method A) isopropyl-benzamide ylamine 191 4-[2-Amino-4-(2-hydroxy- 4-(2-hydroxyethoxy)- 355 [M + H]⁺ 2.08 ethoxy)-quinazolin-6-yl]-N- 6-bromo-quinazolin-2- (Method A) methoxy-benzamide ylamine 192 {4-[2-Amino-4-(2-hydroxy- 4-(2-hydroxyethoxy)- 398 [M + H]⁺ 2.39 ethoxy)-quinazolin-6-yl]- 6-bromo-quinazolin-2- (Method A) phenyl}-thiazolidin-3-yl- ylamine methanone 193 4-[2-Amino-4-(2-hydroxy- 4-(2-hydroxyethoxy)- 298 [M + H]⁺ 2.19 ethoxy)-quinazolin-6-yl]- 6-bromo-quinazolin-2- (Method A) phenol ylamine 194 3-[2-Amino-4-(2-hydroxy- 4-(2-hydroxyethoxy)- 298 [M + H]⁺ 2.22 ethoxy)-quinazolin-6-yl]- 6-bromo-quinazolin-2- (Method A) phenol ylamine 195 4-[2-Amino-4-(2-hydroxy- 4-(2-hydroxyethoxy)- 365 [M + H]⁺ 2.25 ethoxy)-quinazolin-6-yl]-N- 6-bromo-quinazolin-2- (Method A) cyclopropyl-benzamide ylamine 196 {4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 395 [M + H]⁺ 2.61 ethoxy)-quinazolin-6-yl]- bromo-quinazolin-2- (Method A) phenyl}-piperidin-1-yl- ylamine methanone 197 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 417 [M + H]⁺ 2.71 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) benzyl-benzamide ylamine 198 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 383 [M + H]⁺ 2.60 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) isobutyl-benzamide ylamine 199 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 383 [M + H]⁺ 2.62 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) butyl-benzamide ylamine 200 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 383 [M + H]⁺ 2.63 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) tert-butyl-benzamide ylamine 201 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 395 [M + H]⁺ 2.65 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) cyclopentyl-benzamide ylamine 202 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 369 [M + H]⁺ 2.50 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) isopropyl-benzamide ylamine 203 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 357 [M + H]⁺ 2.27 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) methoxy-benzamide ylamine 204 {4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 400 [M + H]⁺ 2.58 ethoxy)-quinazolin-6-yl]- bromo-quinazolin-2- (Method A) phenyl}-thiazolidin-3-yl- ylamine methanone 205 {4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 414 [M + H]⁺ 2.60 ethoxy)-quinazolin-6-yl]- bromo-quinazolin-2- (Method A) phenyl}-thiomorpholin-4-yl- ylamine methanone 206 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 413 [M + H]⁺ 2.30 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) (4,5-dihydro-thiazol-2-yl)- ylamine benzamide 207 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 376 [M + H]⁺ 2.38 ethoxy)-quinazolin-6-yl]-2- bromo-quinazolin-2- (Method A) chloro-N-methyl- ylamine benzamide 208 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 402 [M + H]⁺ 2.48 ethoxy)-quinazolin-6-yl]-2- bromo-quinazolin-2- (Method A) chloro-N-cyclopropyl- ylamine benzamide 209 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 300 [M + H]⁺ 2.40 ethoxy)-quinazolin-6-yl]- bromo-quinazolin-2- (Method A) phenol ylamine 210 3-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 300 [M + H]⁺ 2.44 ethoxy)-quinazolin-6-yl]- bromo-quinazolin-2- (Method A) phenol ylamine 211 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 367 [M + H]⁺ 2.43 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) cyclopropyl-benzamide ylamine 212 4-[2-Amino-4-(2-fluoro- 4-(2-fluoroethoxy)-6- 341 [M + H]⁺ 2.35 ethoxy)-quinazolin-6-yl]-N- bromo-quinazolin-2- (Method A) methyl-benzamide ylamine 213 (S)-4-[2-amino-4-(tetra- 4-(tetrahydrofuran-2- 406 [M + H]⁺ 2.45 hydrofuran-2-ylmethoxy)- ylmethoxy)-6-bromo- (Method A) quinazolin-6-yl]-N- quinazolin-2-ylamine cyclopropylbenzamide 214 4-(2-Amino-4-ethoxy- 6-bromo-4-ethoxy- 309 [M + H]⁺ quinazolin-6-yl)-benzamide quinazolin-2-ylamine 215 (S)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 391 [M + H]⁺ 1.20 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- (Method B) quinazolin-6-yl]-N- quinazolin-2-ylamine cyclopropyl-benzamide 216 (S)-4-[2-Amino-4-(tetra- 4-(tetrahydrofuran-3- 423 [M + H]⁺ 1.41 hydrofuran-3-yloxy)- yloxy)-6-bromo- (Method B) quinazolin-6-yl]-N-(2- quinazolin-2-ylamine dimethylaminoethyl)- benzamide 217 (R)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 465 [M + H]⁺ 2.05 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- (Method A) quinazolin-6-yl]-N-(2- quinazolin-2-ylamine morpholin-4-yl-ethyl)- benzamide 218 (R)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 449 [M + H]⁺ 2.08 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- (Method A) quinazolin-6-yl]-N-(2- quinazolin-2-ylamine pyrrolidin-1-yl-ethyl)- benzamide 219 (R)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 433 [M + H]⁺ 2.50 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- (Method A) quinazolin-6-yl]-N-(2,2,2- quinazolin-2-ylamine trifluoro-ethyl)-benzamide 220 (R)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 463 [M + H]⁺ 2.10 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- (Method A) quinazolin-6-yl]-N-(3- quinazolin-2-ylamine pyrrolidin-1-yl-propyl)- benzamide 221 (R)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 463 [M + H]⁺ 2.09 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- (Method A) quinazolin-6-yl]-N-[2-(1- quinazolin-2-ylamine methyl-pyrrolidin-2-yl)- ethyl]-benzamide 222 (R)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 493 [M + H]⁺ 2.16 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- (Method A) quinazolin-6-yl]-N-(1,1- quinazolin-2-ylamine dimethyl-2-morpholin-4-yl- ethyl)-benzamide 223 (R)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 477 [M + H]⁺ 2.20 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- (Method A) quinazolin-6-yl]-N-(1,1- quinazolin-2-ylamine dimethyl-2-pyrrolidin-1-yl- ethyl)-benzamide 224 (R)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 416 [M + H]⁺ 2.39 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- Method A quinazolin-6-yl]-N-(1- quinazolin-2-ylamine cyano-cyclopropyl)- benzamide 225 (R)-4-[2-Amino-4- 4-(tetrahydrofuran-3- 477 [M + H]⁺ 1.05 (tetrahydro-furan-3-yloxy)- yloxy)-6-bromo- (Method B) quinazolin-6-yl]-N-(1- quinazolin-2-ylamine isopropyl-piperidin-4-yl)- benzamide

Examples 226-243

The following compounds were synthesized using procedures analogous to those described for example 25, starting from materials shown in table 2.

TABLE 2 MS HPLC R_(t) Example Name Starting material (m/z) (minutes) 226 6-(2,4-bis-trifluoromethyl- 4-(3- 459 [M + H]⁺ 2.50 phenyl)-4-(3-dimethyl- dimethylaminopropoxy)- (Method A) aminopropoxy)-quinazolin- 6-bromo- 2-ylamine quinazolin-2-ylamine 227 6-benzofuran-2-yl-4-(3- 4-(3- 363 [M + H]⁺ 2.38 dimethylaminopropoxy)- dimethylaminopropoxy)- (Method A) quinazolin-2-ylamine 6-bromo- quinazolin-2-ylamine 228 6-(3-Chloro-4-fluoro- 4-(3- 376 [M + H]⁺ 2.39 phenyl)-4-(3-dimethyl- dimethylaminopropoxy)- (Method A) aminopropoxy)-quinazolin- 6-bromo- 2-ylamine quinazolin-2-ylamine 229 6-(2,4-Dichlorophenyl)-4- 4-(3- 392 [M + H]⁺ 2.42 (3-dimethylamino- dimethylaminopropoxy)- (Method A) propoxy)-quinazolin-2- 6-bromo- ylamine quinazolin-2-ylamine 230 4-(3-Dimethylamino- 4-(3- 377 [M + H]⁺ 2.37 propoxy)-6-(3,4,5-trifluoro- dimethylaminopropoxy)- (Method A) phenyl)-quinazolin-2- 6-bromo- ylamine quinazolin-2-ylamine 231 4-(3-Dimethylamino- 4-(3- 352 [M + H]⁺ 2.40 propoxy)-6-(3,5-dimethyl- dimethylaminopropoxy)- (Method A) phenyl)-quinazolin-2- 6-bromo- ylamine quinazolin-2-ylamine 232 6-(4-Chloro-phenyl)-4-(3- 4-(3- 358 [M + H]⁺ 2.37 dimethylamino-propoxy)- dimethylaminopropoxy)- (Method A) quinazolin-2-ylamine 6-bromo- quinazolin-2-ylamine 233 4-(3-Dimethylamino- 4-(3- 391 [M + H]⁺ 2.40 propoxy)-6-(3- dimethylaminopropoxy)- (Method A) trifluoromethyl-phenyl)- 6-bromo- quinazolin-2-ylamine quinazolin-2-ylamine 234 6-(4-Chloro-3- 6-bromo-4-(2- 452 [M + H]⁺ 2.50 trifluoromethyl-phenyl)-4- morpholin-4-yl- (Method A) (2-morpholin-4-yl-ethoxy)- ethoxy)-quinazolin-2- quinazolin-2-ylamine ylamine 235 4-[2-Amino-4-(2-morpholin- 6-bromo-4-(2- 367 [M + H]⁺ 2.03 4-yl-ethoxy)-quinazolin-6- morpholin-4-yl- (Method A) yl]-phenol ethoxy)-quinazolin-2- ylamine 236 4-(2-Morpholin-4-yl- 6-bromo-4-(2- 357 [M + H]⁺ 2.19 ethoxy)-6-thiophen-3-yl- morpholin-4-yl- (Method A) quinazolin-2-ylamine ethoxy)-quinazolin-2- ylamine 237 4-(2-Morpholin-4-yl- 6-bromo-4-(2- 357 [M + H]⁺ 2.18 ethoxy)-6-thiophen-2-yl- morpholin-4-yl- (Method A) quinazolin-2-ylamine ethoxy)-quinazolin-2- ylamine 238 6-Benzofuran-2-yl-4-(2- 6-bromo-4-(2- 391 [M + H]⁺ 2.37 morpholin-4-yl-ethoxy)- morpholin-4-yl- (Method A) quinazolin-2-ylamine ethoxy)-quinazolin-2- ylamine 239 6-Furan-3-yl-4-(2- 6-bromo-4-(2- 341 [M + H]⁺ 2.09 morpholin-4-yl-ethoxy)- morpholin-4-yl- (Method A) quinazolin-2-ylamine ethoxy)-quinazolin-2- ylamine 240 6-Benzo[b]thiophen-2-yl-4- 6-bromo-4-(2- 408 [M + H]⁺ 2.41 (2-morpholin-4-yl-ethoxy)- morpholin-4-yl- (Method A) quinazolin-2-ylamine ethoxy)-quinazolin-2- ylamine 241 4-(2-Morpholin-4-yl- 6-bromo-4-(2- 419 [M + H]⁺ 2.34 ethoxy)-6-(2- morpholin-4-yl- (Method A) trifluoromethyl-phenyl)- ethoxy)-quinazolin-2- quinazolin-2-ylamine ylamine 242 4-(2-Morpholin-4-yl- 6-bromo-4-(2- 419 [M + H]⁺ 2.40 ethoxy)-6-(3- morpholin-4-yl- (Method A) trifluoromethyl-phenyl)- ethoxy)-quinazolin-2- quinazolin-2-ylamine ylamine 243 6-(2,3-Difluoro-phenyl)-4- 6-bromo-4-(2- 387 [M + H]⁺ 2.27 (2-morpholin-4-yl-ethoxy)- morpholin-4-yl- (Method A) quinazolin-2-ylamine ethoxy)-quinazolin-2- ylamine

Example 244 Synthesis of 4-isopropoxy-6-thiophen-3-yl-quinazoline Synthesis of 6-Bromo-3H-quinazolin-4-one

To a solution of 5-bromo-2-aminobenzoic acid (7.9 g, 36.6 mmole) in N-methylpyrrolidinone (20 ml) was added formamide (7.25 ml, 182.5 mmole). The reaction mixture was heated at 150° C. for 7 hours, cooled to room temperature, poured into water (400 ml) and stirred for 15 minutes. The resulting suspension was filtered through a sintered glass funnel to collect the precipitate. The solid was dried under vacuum for 16 hrs to give 7.0 g of a tan solid. The resulting compound was characterized as follows: mass spectrometry: M/Z 226; HPLC: method A, retention time (R_(t)) 1.51 minutes).

Synthesis of 6-Bromo-4-chloro-quinazoline

To a suspension of 6-Bromo-3H-quinazolin-4-one (1.5 g, 6.65 mmole) in 1,4-dioxane (30 ml) under nitrogen was added triethylamine (2.8 ml, 19.9 mmole). The resulting suspension was rapidly stirred while phosphorous oxychloride (1.85 ml, 19.9 mmole) was added over 5 minutes. The reaction was stirred at room temperature for 5 minutes, then heated at 80° C. for 30 minutes, when no starting material was detectable by LC/MS. After cooling to room temperature, the reaction mixture was concentrated in vacuo. The resulting residue was partitioned between ethyl acetate and water. The insoluble material was collected by filtration and washed with water. The layers of the filtrate where separated and the organic layer was washed twice with water and once with brine. The organic layer was dried over magnesium sulfate, filtered and concentrated. The resulting solid was combined with the collected precipitate and the mixture was recrystallized from ethyl acetate/hexanes to give 760 mg after drying in vacuo. The resulting compound was characterized as follows: masspectrometry: M/Z=244; HPLC: method A, R_(t) 1.51 minutes.

Synthesis of 6-Bromo-4-isopropoxy-quinazoline

Potassium t-butoxide (4.1 ml, 4.1 mmol; 1M in THF) was added to a suspension mixture of 6-bromo-4-chloro-quinazoline (1.0 g, 4.0 mmol) and 2-propanol (0.313 ml, 4.1 mmol) in THF (20 ml). After stirring at 50° C. for 30 minutes, the mixture was cooled to room temperature and the THF was removed in vacuo. The residue was taken up in ethyl acetate (50 ml) and the organic layer was washed with water followed by brine. The organic layer was dried over Na₂SO₄ and the residue purified by silica gel chromatography with gradient of 11 to 32% ethylacetate-hexane. Product containing fractions were pooled and concentrated to afford the title compound as beige solid (0.93 g, yield: 85%). The resulting compound was characterized as follows: MS (m/z) 266.75 [M+H]⁺; HPLC R_(t)=1.68 minutes (Method A).

Synthesis of 4-isopropoxy-6-thiophene-3-yl-quinazoline

A mixture of 6-bromo-4-isopropoxy-quinazoline (17.9 mg, 0.067 mmol), potassium carbonate (0.13 mmol), tetrakis(triphenylphosphine) palladium (10 mg) and 3-thiophenyl boronic acid (0.08 mmol) in DME (1 ml) and water (0.5 ml) was heated to 50° C. for 30 minutes. The reaction mixture was filtered through a 0.45 micron filter and diluted with ethyl acetate (2 ml). The organic layer was washed with water (1 ml), separated, and concentrated in vacuo. The residue was purified by passage through a pre-packed silica gel column, eluting with ethyl acetate. The solvents were concentrated in vacuo to provide the desired product as a white solid (10 mg, yield: 55%). The resulting compound was characterized as follows: MS (m/z) 271.09 [M+H]⁺; HPLC R_(t)=1.83 minutes (Method A).

Example 245 Synthesis of 4-(4-Isopropoxy-quinazolin-6-yl)-N-methyl-benzamide

The title compound was prepared in an analogous method to 4-isopropoxy-6-thiophene-3-yl-quinazoline, starting with 6-Bromo-4-isopropoxy-quinazoline and using 4-(N-methylaminocarbonyl)phenyl boronic acid. The product was characterized by its mass spectrum MS and HPLC retention time: MS (m/z) 321.03 [M+H]⁺; HPLC R_(t)=1.66 minutes (Method A).

Example 246 Synthesis of 4-(4-(2-methmethoxy)-quinazolin-6-yl)-N-methyl-benzamide

The title compound was prepared in an analogous method to 4-(4-Isopropoxy-quinazolin-6-yl)-N-methyl-benzamide, using 2-methoxyethanol instead of isopropanol. The product was characterized by its mass spectrum MS and HPLC retention time: MS (m/z) 337.97 [M+H]⁺; HPLC R_(t)=1.52 minutes (Method A).

Example 247 Synthesis of 4-ethoxy-6-(1H-pyrazo-4-yl)-quinazoline

The title compound was prepared in an analogous method to 4-isopropoxy-6-thiophene-3-yl-quinazoline, starting with 6-Bromo-4-isopropoxy-quinazoline and using 1H-pyrazole-4-boronic acid. The product was characterized by its mass spectrum MS and HPLC retention time. MS (m/z) 241.05 [M+H]⁺; HPLC R_(t)=1.41 minutes (Method A).

Example 248 Synthesis of 6-(4-Fluorophenyl)-4-isopropoxy-quinazoline

The title compound was prepared in an analogous manner to example 34 using isopropyl alcohol. The compound was characterized by H-NMR (300 MHz, DMSO-d6) as follows: δ 1.42 (6,d), 5.59 (1p, septet), 7.38 (2p, t), 7.82 (1p, dd), 7.96 (2p, d), 8.24 (2p, m) 8.78 (1p, s).

Example 249 Synthesis of (S)-4-(2-(4-fluorobenzylamino)-4-(tetrahydrofuran-3-yloxy)quinazolin-6-yl)-N-(2-(dimethylamino)ethyl)benzamide

A suspension of 2-amino-5-bromobenzamide (250 mg, 1.16 mmol) and thiophosgene (200 mg, 1.74 mmol) in 1,4-dioxane (10 mL) was heated at 100° C. for 1 hour. Solvent was removed to provide 0.32 g of crude product which was used without further purification but characterized by mass spectrometry: MS (m/z) 257 [M+H]⁺.

A solution of 6-bromo-2-mercaptoquinazolin-4-ol (0.32 g, 1.26 mmol), methyl iodide and sodium ethoxide in DMF (5 mL) was stirred at room temperature for 3 hours. HCl (1N, 3 ml) was added and the mixture was extracted with ethyl acetate. The organic layer was dried and concentrated to provide 0.31 g of crude product which was used without further purification but characterized by mass spectrometry: MS (m/z) 271 [M+H]⁺.

A suspension of 6-bromo-2-(methylthio)quinazolin-4-ol (0.31 g, 1.14 mmol) and MCPBA (0.51 g, 2.28 mmol) (77%) in DCM (30 mL) was stirred at room temperature for 2 hours. The mixture was diluted with DCM and washed twice with NaHCO₃. The organic layer was dried and concentrated to provide 0.32 g of crude product which was used without further purification but characterized by mass spectrometry: MS (m/z) 303 [M+H]⁺.

A solution of 6-bromo-2-(methylsulfonyl)quinazolin-4-ol (0.16 g, 0.55 mmol), 2,6-lutidine (300 mg, 2.75 mmol) and 4-fluorobenzyl amine (306 mg, 2.75 mmol) in 1,4-dioxane (2 mL) was heated at 70° C. overnight. Solvents were concentrated in vacuo and the residue was purified by RP HPLC, using a C18 column with a gradient of 0.1% H₂O, 0.1% TFA-acetonitrile, to provide the desired product 105 mg. The product was characterized by mass spectrometry: MS (m/z) 348 [M+H]⁺.

A suspension of 2-(4-fluorobenzylamino)-6-bromoquinazolin-4-ol (105 mg g, 0.224 mmol), 1,2,4-triazole (63 mg, 0.897 mmol), DIEA (144.5 mg, 1.12 mmol) and POCl₃ (134 mg, 0.897 mmol) in acetonitrile (1 mL) was stirred at room temperature for 1 hour. Ethyl acetate was added and the mixture was washed twice with brine. The organic layer was dried and concentrated to provide 0.12 g of crude product which was used without further purification but characterized by mass spectrometry: MS (m/z) 399 [M+H]⁺.

A suspension of N-(4-fluorobenzyl)-6-bromo-4-(1H-1,2,4-triazol-1-yl)quina-zolin-2-amine (120 mg g, 0.3 mmol), (S)-tetrahydrofuran-3-ol (66 mg, 0.75 mmol) and potassium t-butoxide (0.75 mmol) in THF (1 mL) was stirred at room temperature for 1 hour. Ethyl acetate was added and the mixture was washed twice with NaHCO₃. The organic layer was dried and concentrated to provide 0.1 g of crude product which was used without further purification but characterized by mass spectrometry: MS (m/z) 418 [M+H]⁺.

(S)—N-(4-fluorobenzyl)-6-bromo-4-(tetrahydrofuran-3-yloxy)quinazolin-2-amine (50 mg, 0.12 mmol), potassium carbonate (33 mg, 0.24 mmol), tetrakis(triphenyl-phosphine)palladium (8 mg, 0.007 mmol) and 4-((2-(dimethylamino)ethyl)-carbamoyl)phenylboronic acid (36 mg, 0.132 mmol) in DMF (1.0 mL) and water (0.3 mL) was heated to 150° C. for 10 minutes under microwave irradiation. Solvents were concentrated in vacuo and the residue was purified by RP HPLC, using a C18 column with a gradient of 0.1% H₂O, 0.1% TFA-acetonitrile, to provide the desired product (41 mg) which was characterized by its mass spectrum as follows: MS (m/z): 530 ([M+H]⁺, 100); HPLC R_(t)=1.26 minutes (Method B).

Example 250 Synthesis of 4-{[4-Ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide

4-[(6-Bromo-4-hydroxy-quinazolin-2-ylamino)-methyl]-benzenesulfonamide was made by an analogous procedure to 2-(4-fluorobenzylamino)-6-bromoquinazolin-4-ol using 4-aminomethyl benzenesulfonamide hydrochloride.

4-[(6-Bromo-4-[1,2,4]triazol-1-yl-quinazolin-2-ylamino)-methyl]-benzene-sulfonamide was made by an analogous procedure to N-(4-fluorobenzyl)-6-bromo-4-(1H-1,2,4-triazol-1-yl)quinazolin-2-amine using 4-[(6-Bromo-4-hydroxy-quinazolin-2-ylamino)-methyl]-benzenesulfonamide.

4-[(6-Bromo-4-ethoxy-quinazolin-2-ylamino)-methyl]-benzenesulfonamide was made by an analogous procedure to (S)—N-(4-fluorobenzyl)-6-bromo-4-(tetrahydro-furan-3-yloxy)quinazolin-2-amine using ethanol as the reactant.

4-{[4-Ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfon-amide was made by an analogous procedure to (S)-4-(2-(4-fluorobenzylamino)-4-(tetrahydrofuran-3-yloxy)quinazolin-6-yl)-N-(2-(dimethylamino)ethyDbenzamide using 4-[(6-bromo-4-ethoxy-quinazolin-2-ylamino)-methyl]-benzenesulfonamide and 4-fluorophenyl boronic acid. The product was characterized as follows: MS (m/z): 453 ([M+H]⁺, 100); HPLC R=1.57 minutes (Method B).

Example 251 Synthesis of 4-{[6-(3-Cyclopropanesulfonylamino-4-fluoro-phenyl)-4-ethoxy-quinazolin-2-ylamino]-methyl}-benzenesulfonamide

4-{[6-(3-Cyclopropanesulfonylamino-4-fluoro-phenyl)-4-ethoxy-quinazolin-2-ylamino]-methyl}-benzenesulfonamide was made by an analogous procedure to 4-{[4-ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide using 4-[(6-bromo-4-ethoxy-quinazolin-2-ylamino)-methyl]-benzenesulfonamide and 3-cyclopropane-sulfonylamino-4-fluoro-phenyl boronic acid. The product was characterized was follows: MS (m/z): 572 ([M+H]⁺, 100); HPLC R_(t)=2.78 minutes (Method A).

Example 252 Synthesis of 4-{[6-(3-aminosulfonyl-phenyl)-4-ethoxy-quinazolin-2-ylamino]-methyl}-benzenesulfonamide

4-{[6-(3-aminosulfonyl-phenyl)-4-ethoxy-quinazolin-2-ylamino]-methyl}-benzenesulfonamide was made by an analogous procedure to 4-{[4-ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide using 4-[(6-bromo-4-ethoxy-quinazolin-2-ylamino)-methyl]-benzenesulfonamide and 3-aminosulfonyl-phenyl boronic acid. The product was characterized as follows: MS (m/z): 514 ([M+H]⁺, 100); HPLC R_(t)=2.56 minutes (Method A).

Example 253 Synthesis of pyrrolidine-1-carboxylic acid {4-[4-ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-phenyl}-amide

Pyrrolidine-1-carboxylic acid {4-[4-ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-phenyl}-amide was made by an analogous procedure to 4-{[4-ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide using pyrrolidine-1-carboxylic acid [4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-amide. The product was characterized as follows: MS (m/z): 547 ([M+H]⁺, 100); HPLC R_(t)=2.76 minutes (Method A).

Example 254 Synthesis of 4-{[4-ethoxy-6-(4-ureido-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide

4-{[4-Ethoxy-6-(4-ureido-phenyl)-quinazolin-2-ylamino]-methyl}-benzene-sulfonamide was made by an analogous procedure to 4-{[4-Ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide using 4-[(6-bromo-4-ethoxy-quinazolin-2-ylamino)-methyl]-benzenesulfonamide and [4-(4,4,5,5-tetra-methyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-urea. The product was characterized as follows: MS (m/z): 493 ([M+H]⁺, 100); HPLC R_(t)=2.51 minutes (Method A).

Example 255 Synthesis of 4-[4-Ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-benzamide

4-[4-ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-benzamide was made by an analogous procedure to 4-{[4-Ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide using 4-[(6-bromo-4-ethoxy-quinazolin-2-ylamino)-methyl]-benzenesulfonamide and 4-aminocarbonylphenyl boronic acid. The product was characterized as follows: MS (m/z): 478 ([M+H]⁺, 100); HPLC R_(t)=2.53 minutes (Method A).

Example 256 Synthesis of N-Cyclopropyl-4-[4-ethoxy-2-(4-sulfamoyl-benzylamino)-auinazolin-6-yl]-benzamide

N-Cyclopropyl-4-[4-ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-benzamide was made by an analogous procedure to 4-{[4-Ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide using 4-[4-(6-bromo-4-ethoxy-quinazolin-2-ylamino)-methyl]-benzenesulfonamide and 4-(cyclopropylamino-carbonyl)phenyl boronic acid. The product was characterized as follows: MS (m/z): 518 ([M+H]⁺, 100); HPLC R_(t)=2.68 minutes (Method A).

Example 257 Synthesis of 4-Ethoxy-2-(4-fluorobenzylamino)-6-(4-fluoro-phenyl)-quinazoline

N-(4-fluorobenzyl)-6-bromo-4-ethoxy-quinazolin-2-amine was made by an analogous procedure to (S)—N-(4-fluorobenzyl)-6-bromo-4-(tetrahydrofuran-3-yloxy)-quinazolin-2-amine using ethanol as the reactant.

4-ethoxy-2-(4-fluorobenzylamino)-6-(4-fluoro-phenyl)-quinazoline was made by an analogous procedure to (S)-4-(2-(4-fluorobenzylamino)-4-(tetrahydrofuran-3-yloxy)quinazolin-6-yl)-N-(2-(dimethylamino)ethyl)benzamide using N-(4-fluorobenzyl)-6-bromo-4-ethoxy-quinazolin-2-amine and 4-fluorophenyl boronic acid. The resulting product was characterized as follows: MS (m/z): 392 ([M+H]⁺, 100); HPLC R_(t)=3.18 minutes (Method A).

Example 258 Synthesis of N-Cyclopropyl-4-[4-ethoxy-2-(4-fluorobenzylamino)-quinazolin-6-yl]-benzamide

N-Cyclopropyl-4-[4-ethoxy-2-(4-fluorobenzylamino)-quinazolin-6-yl]-benzamide was made made by an analogous procedure to (S)-4-(2-(4-fluorobenzylamino)-4-(tetrahydrofuran-3-yloxy)quinazolin-6-yl)-N-(2-(dimethylamino)-ethyl)benzamide using N-(4-fluorobenzyl)-6-bromo-4-ethoxy-quinazolin-2-amine and 4-(cyclopropylaminocarbonyl)phenyl boronic acid. The product was characterized as follows: MS (m/z): 457 ([M+H]⁺, 100); HPLC R_(t)=2.97 minutes (Method A).

Example 259 Synthesis of 6-(4-Fluoro-phenyl)-4-propyl-quinazoline

To a solution of 4-chloro-6-(4-fluorophenyl)-quinazoline (258 mg, 1 mmol) and Fe(acac)₃ (17 mg, 0.05 mmol) in THF (5 ml) was added n-propyl magnesium bromide (600 ul of 2M THF solution). The reaction was stirred at RT for 1 hour at RT then diluted with ether (5 ml) and quenched with 3 drops 2N HCl. The mixture was further diluted with ether and extracted with H₂O. The aqueous layer was neutralized with a saturated aqueous NaHCO₃ solution and extracted 3× with ether. The combined organics were washed once with NaHCO₃ and once with a saturated aqueous NaCl solution, dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by column chromatography on SiO₂ using EtOAc/hex (10-30% EtOAc) to give the title compound (115 mg, 43% yield) which was characterized by mass spectrum as follows: (m/z): 267 ([M+H]) 100).

Example 260 Anti-HCV Assay/Replicon Assay

The anti HCV activity of the quinazoline derivatives of this invention was tested in a human hepatoma Huh-7 cell line harbouring a HCV replicon. The assay comprised the following steps:

Step 1: compound preparation and serial dilution

-   1. for water soluble quinazoline derivatives, a volume of 500 μL of     solution in cell media (DMEM, 10% FBS, P/S, L-Glutamine) was     prepared with a concentration being twice the concentration of the     starting final serial dilution concentration. A volume of 150 μL of     the solution was added to the pre-specified wells in column 1 of a     96-well cell culture plate (PerkinElmer, white plate, cat. #     6005181, for EC₅₀ assay; black plate, cat. # 6005182 for CC₅₀     assay). The rest of the plate, columns 2-12, was filled with 100 μL     of cell media. The plate was then placed on a Precision 2000     Workstation to start the serial dilution. Compounds were diluted     three times each step from column 1 to column 10. Column 11 was used     as a blank control (no compound added). -   2. for quinazoline derivatives requiring DMSO to dissolve, serial     dilution is performed in 50% DMSO in a 384-well plate. A solution     containing a compound at 100-fold concentration of the starting     final serial dilution concentration was prepared in 50% DMSO and     added to the pre-specified wells in column 1 of a polypropylene     384-well plate. The plate was then placed on a Precision 2000     Workstation to start the serial dilution. After the serial dilution,     a volume of 2 μL of the solution was transferred from the 384-well     plate to a 96-well cell culture plate containing 100 μL of cell     media on a Biomek FX Workstation. The DMSO concentration in the     final assay condition was 0.5% after cells are added to the plate     and the total volume in each well is brought to 200 μL.

Step 2: to each well of the serial dilution plate prepared above, 100 μL of cell media containing 6000 suspended Huh-7 HCV replicon cells was added with a Multidrop workstation. The plates were incubated for 3 days at 37° C. with 5% CO₂.

Step 3: detection:

-   a) for the EC₅₀ assay, the media in a 96-well cell culture plate was     aspirated with a Biotek EL405 plate-washer. A volume of 200 μL of a     solution containing a 1:1 mixture of cell-lysis buffer (Promega,     Luciferase Cell Culture Lysis 5× Reagent, cat. #E1531) and     luciferase substrate solution (Promega, Luciferase Assay, cat.#     E4550) was added to each well of the plate with Multidrop. The plate     was incubated for 30 minutes at room temperature before the     luminescence signal was measured with a TopCount plate-reader. -   b) for the CC₅₀ assay, a volume of 100 μL of pre-mixed CellTiter-Glo     (Promega, cat.# G7572) solution is added directly to the cell     culture in each well of the plate and the luminescence signal is     measured with a TopCount plate-reader after 10 minutes of incubation     at room temperature.

Table 3 below shows EC₅₀ and CC₅₀ values (expressed in nM and μM respectively, i.e. nmol/l and μmol/l) of a few quinazoline derivatives tested in this assay. Results in the table below are expressed by the following data:

-   -   the 50% cytostatic concentration (CC₅₀), i.e. the concentration         that results in 50% inhibition of cell growth, and     -   the 50% effective concentration (EC₅₀), i.e. the concentration         that protects 50% A of the cell monolayer from virus-induced         cythopathic effect.

TABLE 3 EC₅₀ CC₅₀ (A < 0.3 μM; 0.3 μM < B < 1 μM; (A < 10 μM; B 10-20 μM; Example 1 μM < C < 10 μM) C > 20 μM) 18 A A 19 C C 20 C B 21 C C 26 C B 27 B C 28 B B 29 B C 30 B C 31 B C 32 B C 34 B C 35 C C 38 C B 39 C C 40 C C 41 C C 42 C A 43 A C 44 C C 45 C C 46 C C 47 C C 48 B C 49 C C 50 C B 51 B B 52 C B 53 C A 54 C C 55 C C 56 C C 57 C B 58 C C 59 C C 60 C C 61 C C 62 C B 63 C C 64 C C 65 C C 66 C C 67 C B 68 B B 69 C C 70 C B 71 B C 72 C C 73 C B 74 C B 75 B C 76 C C 77 C B 78 C C 79 C C 80 C C 81 C B 82 C C 83 C B 84 B B 85 B C 86 B C 87 B B 88 C C 89 B B

0 B C

B B

B B

B B

C C

C C

B C

B C

C A

B C

A B 101 C B 102 C A 103 C B 104 C C 105 C B 106 C B 107 C C 108 C C 109 C C 110 C B 111 B B 112 C C 113 B B 114 C B 115 A A 116 C C 117 C B 118 B B 119 C B 120 B B 121 C C 122 C C 123 A B 124 C C 125 B C 126 C C 127 C C 128 C C 129 C C 130 C B 131 C C 132 B B 133 C B 134 B B 135 C C 136 B B 137 C C 138 A A 139 C A 140 C C 141 C C 142 B C 143 B B 144 B A 145 C A 146 A A 147 B A 148 C C 149 C C 150 C B 151 C B 152 B C 153 B B 154 B B 155 B B 156 B C 157 C C 158 C C 159 A A 160 C C 161 B A 162 C C 163 C C 164 C C 165 C C 166 C B 167 A C 168 C C 169 C C 170 B A 171 B B 172 B A 173 A A 174 B B 175 A A 176 A B 177 A B 178 A A 179 B A 180 C B 181 B B 182 A C 183 B C 184 B A 185 A A 186 B B 187 C C 188 C C 189 C C 190 C C 191 C C 192 C C 193 C C 194 C B 195 C C 196 C C 197 C B 198 C B 199 C C 200 C C 201 C B 202 C C 203 C C 204 C C

05 C C

6 C C 207 C C 208 C C 209 C C 210 C C 211 B C 212 C C 213 A C 214 A C 215 A C 216 A C 217 A C 218 A A 219 A C 220 A A 221 B B 222 A C 223 A A 224 A C 225 C C 226 C C 227 C C 228 C C 229 C C 230 C C 231 C C 232 C C 233 C C 234 C B 235 C C 236 C C 237 C C 238 C B 239 C B 240 C C 241 C C 242 C B 243 C C 244 C C 245 C C 246 C C 247 B C 248 C C 249 A A 250 C A 251 A A 252 A A 253 A B 254 A A 255 A A 256 A A 259 C C

indicates data missing or illegible when filed 

1-19. (canceled)
 20. A 4,6-disubstituted or 2,4,6-trisubstituted quinazoline derivative represented by the structural formula (I)

wherein, R₂ is selected from the group consisting of hydrogen and NR′R″; A is O; R₄ is selected from the group consisting of C₁₋₇ alkyl; C₂₋₇ alkenyl; C₃₋₁₀ cycloalkyl; C₃₋₁₀ cycloalkenyl; aryl; heterocyclyl; arylalkyl; heterocyclic-substituted C₁₋₇ alkyl and C₃₋₁₀ cycloalkyl-C₁₋₇ alkyl; and wherein said R₄, when different from hydrogen, is optionally substituted with one or more R₇; Y is a single bond; R₆ is selected from the group consisting of halogen, heteroaryl and aryl, wherein said heteroaryl or aryl is optionally substituted with one or more R₈; R₇ and R₈ are each independently selected from the group consisting of halogen, nitro, hydroxyl, sulfhydryl, hydroxylamino, cyano, amino, C₁₋₇ alkyl optionally substituted with one or more halogen, C₂₋₇ alkenyl, C₂₋₇ alkynyl, C₁₋₇ alkoxy optionally substituted with one or more halogen, C₁₋₇ alkylthio, formyl, —CO—NHR₉, —CO—NR₉R₉′, —CS—NHR₉, —NR₁₂—CO—NHR₁₂, —NR₁₂—CS—NHR₁₂, —SO₂NH₂, —NR₁₂—SO₂R₁₁, —NR₁₂—COR₁₀, —NR₁₂—CSR₁₀, alkoxyamino, mercapto-amino, thioalkylamino, alkylamino, alkenylamino, alkynylamino, alkylsulfoxide, alkylsulfone, hydroxyalkylamino, mercaptoalkylamino, hydrazino, alkyl-hydrazino, cycloalkyl, aryl, aryloxy, carboxylic acid or esters or thioesters or halides or anhydrides or amides thereof, thiocarboxylic acid or esters or thioesters or halides or anhydrides or amides thereof, and heterocyclyl optionally substituted with one or more substituents selected from the group consisting of hydroxy, oxo, halogen, amino, C₁₋₇alkyl and C₁₋₇alkoxy; and R₉ and R₉′ are each independently selected from the group consisting of hydrogen; C₃₋₁₀cycloalkyl optionally substituted with one more substituents selected from the group consisting of cyano, halogen, hydroxy, amino, C₁₋₇ alkyl and C₁₋₇alkoxy; C₁₋₇alkoxy; C₁₋₇alkyl optionally substituted with one or more substituents selected from the group consisting of amino, alkylamino, cyano, dialkylamino, halogen and heterocyclyl optionally substituted with C₁₋₇alkyl; heterocyclyl optionally substituted with C₁₋₇ alkyl; aryl and arylC₁₋₇ alkyl wherein the aryl moiety is optionally substituted with one or more halogens; or R₉ and R₉′ together with the nitrogen to which they are attached form a heterocycle; R₁₀ and R₁₁ are each independently selected from the group consisting of C₁₋₇ alkyl optionally substituted with one or more substituents independently selected from the group consisting of amino, cyano, halogen and hydroxy; C₁₋₇ alkoxy optionally substituted with one or more substituents independently selected from the group consisting of amino, alkylamino, cyano, dialkylamino, halogen, and heterocyclyl; heterocyclyl optionally substituted with one or more substituents independently selected from the group consisting of C₁₋₇ alkyl, acylamino and oxo; C₃₋₁₀ cycloalkyl optionally substituted with one or more substituents independently selected from the group consisting of amino or hydroxy; and amino optionally substituted with one or more substituents independently selected from the group consisting of C₁₋₇ alkyl wherein said C₁₋₇ alkyl is optionally substituted with one or more substituents independently selected from the group consisting of amino, alkylamino, cyano, dialkylamino, halogen and heterocyclyl; each R₁₂ is selected from the group consisting of hydrogen and C₁₋₇ alkyl, wherein said C₁₋₇ alkyl is optionally substituted with one or more substituents independently selected from the group consisting of cyano, halogen and hydroxy; or Y is a single bond and R₆ is aryl substituted with one or more substituents independently selected from the group consisting of aryl, acyl, halo-C₁₋₇ alkoxy, hydroxy-C₁₋₇ alkyl, di-(C₁₋₇alkyl)amino C₁₋₇alkyl, ω-carboxy-alkanoylamino, (O,O-dialkylphosphonyl)-C₁₋₇alkyl; mono-(C₃₋₇ cycloalkyl)-aminocarbonyl, di-(C₃₋₇cycloalkyl)aminocarbonyl, mono-(C₁₋₇ alkyl)amino-carbonyl, mono-(ω-dimethylamino-C₁₋₇alkyl)aminocarbonyl, (di-C₁₋₇ alkyl)aminocarbonyl, mono-(hydroxy-C₁₋₇ alkyl)aminocarbonyl, formylamino, —SO₂NH₂, arylamino-C₁₋₇ alkyl, C₁₋₇ alkylsulfonyl, heterocyclyl-carbonyl, heterocyclyl-C₁₋₇ alkyl and heterocyclyl, wherein said heterocyclyl is optionally substituted with C₃₋₇ alkenyloxycarbonyl, C₁₋₇ alkyl or C₁₋₇ alkyloxycarbonyl; or Y is a single bond and R₆ is heterocyclyl substituted with one or more substituents independently selected from the group consisting of acylamino, C₁₋₇ alkylsulfonyl, arylsulfonyl, heterocyclyl-C₁₋₇ alkyl, heterocyclyl-C₁₋₇ alkylamino, aryl and heterocyclyl, wherein said heterocyclyl is optionally substituted with C₁₋₇ alkyl, arylsulfonyl or (di-C₁₋₇ alkylamino)-C₁₋₇ alkoxy, or said heterocyclyl is non-aromatic and includes a nitrogen atom substituted with heterocyclyl-C₁₋₇ alkyl or a carboxylic acid or a C₁₋₇ alkyl ester thereof, R′ and R″ are each independently selected from the group consisting of hydrogen, C₁₋₇ alkyl-carbonyl and C₁₋₇ alkyl, wherein said C₁₋₇ alkyl is optionally substituted with one or more groups independently selected from the group consisting of hydroxy, halogen, C₁₋₇ alkoxy, heterocyclyl, arylC₁₋₇ alkyl and C₃₋₁₀ cycloalkyl; or one of R′ and R″ is hydrogen and the other one of R′ and R″ is selected from the group consisting of —CHR₁₃R₁₄ and R₁₅, wherein at least one of R₁₃ and R₁₄ is aryl optionally substituted with one or more R₁₆, and the other one of R₁₃ and R₁₄ is selected from the group consisting of hydrogen, C₁₋₇ alkyl optionally substituted with one or more substituents independently selected from the group consisting of halogen and C₁₋₇alkoxy, C₃₋₁₀cycloalkyl, heterocyclyl and aryl wherein said heterocyclyl or aryl are optionally substituted with one or more R₁₆, and wherein R₁₅ is selected from the group consisting of C₃₋₁₀ cycloalkyl, heteroaryl and aryl, wherein said heteroaryl or aryl is optionally substituted with one or more substituents independently selected from the group consisting of halogen and C₁₋₇ alkyl, and wherein said C₃₋₁₀ cycloalkyl is optionally substituted at the carbon position adjacent to the nitrogen atom to which it is attached with aryl or heteroaryl wherein said aryl is optionally substituted with halogen; each R₁₆ is independently selected from the group consisting of halogen, hydroxy, amino, nitro, cyano, halo C₁₋₇alkyl, halo C₁₋₇alkoxy, C₁₋₇ alkyl, C₁₋₇ alkoxy, di-C₁₋₇ alkylamino, mono-C₁₋₇ alkylamino, carboxamido, —SO₂NH₂, carbamoyl, —NR₁₂—SO₂R₁₁ and phenoxy, and/or a pharmaceutically acceptable addition salt thereof and/or a stereo-isomer thereof and/or a mono- or a di-N-oxide thereof and/or a solvate thereof and/or a pro-drug form thereof, provided that when R₂ is hydrogen and R₄ is selected from the group consisting of C₃₋₁₀ cycloalkyl, aryl and heterocyclyl, R₇ is not C₃₋₁₀ cycloalkyl, aryl or heterocyclyl, and provided that said quinazoline derivative is not 2-amino-4-ethoxy-6-(4-fluorophenyl)-quinazoline or 4-ethoxy-6-(4-fluorophenyl)-quinazoline.
 21. A quinazoline derivative selected from the group consisting of: 2-amino-6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-(2-methoxyethoxy)-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-isopropoxy-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-(cyclopropyl-methoxy)-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-(trifluoromethoxy)-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-ethoxy-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-methoxy-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-butoxy-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-sec-butoxy-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-tent-butoxy-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-propoxy-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-benzyloxy-quinazoline, 2-amino-6-(3,4-dimethoxyphenyl)-4-cyclopentyloxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-hydroxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-(2-methoxyethoxy)-quinazoline, 2-amino-6-(4-fluorophenyl)-4-isopropoxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-(cyclopropyl-methoxy)-quinazoline, 2-amino-6-(4-fluorophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline, 2-amino-6-(4-fluorophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline, 2-amino-6-(4-fluorophenyl)-4-(trifluoromethoxy)-quinazoline, 2-amino-6-(4-fluorophenyl)-4-ethoxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-methoxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-butoxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-sec-butoxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-tert-butoxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-propoxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-benzyloxy-quinazoline, 2-amino-6-(4-fluorophenyl)-4-cyclopentyloxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-hydroxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-isopropoxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-(2-methoxyethoxy)-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-ethoxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-(cyclopropyl-methoxy)-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-(trifluoromethoxy)-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-methoxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-butoxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-sec-butoxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-tert-butoxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-propoxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-benzyloxy-quinazoline, 2-amino-6-(4-acetamidophenyl)-4-cyclopentyloxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-(2-methoxyethoxy)-quinazoline, 6-(3,4-dimethoxyphenyl)-4-isopropoxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-(cyclopropyl-methoxy)-quinazoline, 6-(3,4-dimethoxyphenyl)-4-(2-(4-morpholinyl)ethoxy-]-quinazoline, 6-(3,4-dimethoxyphenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline, 6-(3,4-dimethoxyphenyl)-4-(trifluoromethoxy)-quinazoline, 6-(3,4-dimethoxyphenyl)-4-ethoxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-methoxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-butoxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-sec-butoxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-tert-butoxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-propoxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-benzyloxy-quinazoline, 6-(3,4-dimethoxyphenyl)-4-cyclopentyloxy-quinazoline, 6-(4-fluorophenyl)-4-hydroxy-quinazoline, 6-(4-fluorophenyl)-4-(2-methoxyethoxy)-quinazoline, 6-(4-fluorophenyl)-4-isopropoxy-quinazoline, 6-(4-fluorophenyl)-4-(cyclopropyl-methoxy)-quinazoline, 6-(4-fluorophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline, 6-(4-fluorophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline, 6-(4-fluorophenyl)-4-(trifluoromethoxy)-quinazoline, 6-(4-fluorophenyl)-4-ethoxy-quinazoline, 6-(4-fluorophenyl)-4-methoxy-quinazoline, 6-(4-fluorophenyl)-4-butoxy-quinazoline, 6-(4-fluorophenyl)-4-sec-butoxy-quinazoline, 6-(4-fluorophenyl)-4-tert-butoxy-quinazoline, 6-(4-fluorophenyl)-4-propoxy-quinazoline, 6-(4-fluorophenyl)-4-benzyloxy-quinazoline, 6-(4-fluorophenyl)-4-cyclopentyloxy-quinazoline, 6-(4-acetamidophenyl)-4-hydroxy-quinazoline, 6-(4-acetamidophenyl)-4-isopropoxy-quinazoline, 6-(4-acetamidophenyl)-4-(2-methoxyethoxy)-quinazoline, 6-(4-acetamidophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline, 6-(4-acetamidophenyl)-4-ethoxy-quinazoline, 6-(4-acetamidophenyl)-4-(cyclopropyl-methoxy)-quinazoline, 6-(4-acetamidophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline, 6-(4-acetamidophenyl)-4-(trifluoromethoxy)-quinazoline, 6-(4-acetamidophenyl)-4-methoxy-quinazoline, 6-(4-acetamidophenyl)-4-butoxy-quinazoline, 6-(4-acetamidophenyl)-4-sec-butoxy-quinazoline, 6-(4-acetamidophenyl)-4-tert-butoxy-quinazoline, 6-(4-acetamidophenyl)-4-propoxy-quinazoline, 6-(4-acetamidophenyl)-4-benzyloxy-quinazoline, 6-(4-acetamidophenyl)-4-cyclopentyloxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-hydroxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-(2-methoxyethoxy)-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-isopropoxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-(cyclopropyl-methoxy)-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-(trifluoromethoxy)-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-ethoxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-methoxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-butoxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-sec-butoxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-tert-butoxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-propoxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-benzyloxy-quinazoline, 2-acetamino-6-(3,4-dimethoxyphenyl)-4-cyclopentyloxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-hydroxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-(2-methoxyethoxy)-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-isopropoxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-(cyclopropyl-methoxy)-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-(trifluoromethoxy)-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-ethoxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-methoxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-butoxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-sec-butoxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-tert-butoxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-propoxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-benzyloxy-quinazoline, 2-acetamino-6-(4-fluorophenyl)-4-cyclopentyloxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-hydroxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-isopropoxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-(2-methoxyethoxy)-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-[2-(4-morpholinyl)ethoxy]-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-ethoxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-(cyclopropyl-methoxy)-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-(2,2,2-trifluoroethoxy)-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-(trifluoromethoxy)-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-methoxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-butoxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-sec-butoxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-tert-butoxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-propoxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-benzyloxy-quinazoline, 2-acetamino-6-(4-acetamidophenyl)-4-cyclopentyloxy-quinazoline, 6-(2,3-Difluoro-phenyl)-4-ethoxy-quinazolin-2-ylamine, 4-Ethoxy-6-p-tolyl-quinazolin-2-ylamine, 4-Ethoxy-6-furan-3-yl-quinazolin-2-ylamine, 4-Ethoxy-6-(2H-pyrazol-3-yl)-quinazolin-2-ylamine, 4-Ethoxy-6-thiophen-2-yl-quinazolin-2-ylamine, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-methyl-benzamide, 4-Ethoxy-6-furan-2-yl-quinazolin-2-ylamine, 4-Ethoxy-6-thiophen-3-yl-quinazolin-2-ylamine, 6-(3,4-Difluoro-phenyl)-4-ethoxy-quinazolin-2-ylamine, 3-(2-Amino-4-ethoxy-quinazolin-6-yl)-benzonitrile, 4-Ethoxy-6-(2H-pyrazol-4-yl)-quinazolin-2-ylamine, 6-(4-Amino-phenyl)-4-ethoxy-quinazolin-2-ylamine, 4-Ethoxy-6-(2,3,4-trifluoro-phenyl)-quinazolin-2-ylamine, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenol, 6-(2,3-Difluoro-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine, 4-(2-Methoxy-ethoxy)-6-(2-trifluoromethyl-phenyl)-quinazolin-2-ylamine, 6-(5-Chloro-thiophen-2-yl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine, 4-(2-Methoxy-ethoxy)-6-p-tolyl-quinazolin-2-ylamine, 6-Benzo[b]thiophen-2-yl-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine, 6-Benzofuran-2-yl-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine, 4-(2-Methoxy-ethoxy)-6-thiophen-2-yl-quinazolin-2-ylamine, 4-(2-Amino-4-(2-methoxy-ethoxy)-quinazolin-6-yl)-N-methyl-benzamide, 4-(2-Methoxy-ethoxy)-6-furan-2-yl-quinazolin-2-ylamine, 4-(2-Methoxy-ethoxy)-6-thiophen-3-yl-quinazolin-2-ylamine, 6-(3,4-Difluoro-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine, 3-(2-Amino-4-(2-methoxy-ethoxy)-quinazolin-6-yl)-benzonitrile, 4-(2-Methoxy-ethoxy)-6-(2H-pyrazol-4-yl)-quinazolin-2-ylamine, 6-(4-Amino-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine, 4-(2-Methoxy-ethoxy)-6-(2,3,4-trifluoro-phenyl)-quinazolin-2-ylamine, 6-(4-Fluoro-2-methyl-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine, 4-[2-Amino-4-(2-methoxy-ethoxy)-quinazolin-6-yl]-phenol, 6-(4-Chloro-3-trifluoromethyl-phenyl)-4-(2-methoxy-ethoxy)-quinazolin-2-ylamine, 4-Benzyloxy-6-(2H-pyrazol-3-yl)-quinazolin-2-ylamine, 4-(2-Amino-4-benzyloxy-quinazolin-6-yl)-N-methyl-benzamide, 4-Benzyloxy-6-(1H-pyrazol-4-yl)-quinazolin-2-ylamine, 4-[2-(2-Dimethylamino-ethoxy)-ethoxy]-6-(4-trifluoromethoxy-phenyl)-quinazolin-2-ylamine, 6-(2,4-Difluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine, 6-(2,3-Difluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine, 4-Isopropoxy-6-(3-trifluoromethyl-phenyl)-quinazolin-2-ylamine, 4-Isopropoxy-6-(2-trifluoromethyl-phenyl)-quinazolin-2-ylamine, 4-Isopropoxy-6-(4-chloro-phenyl)-quinazolin-2-ylamine, 4-Isopropoxy-6-p-tolyl-quinazolin-2-ylamine, 6-(2,4-Dichloro-phenyl)-4-isopropoxy-quinazolin-2-ylamine, 6-(2-Chloro-4-fluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine, 6-(3-Chloro-phenyl)-4-isopropoxy-quinazolin-2-ylamine, 6-Benzo[b]thiophen-2-yl-4-isopropoxy-quinazolin-2-ylamine, 6-Furan-3-yl-4-isopropoxy-quinazolin-2-ylamine, 4-Isopropoxy-6-(2H-pyrazol-3-yl)-quinazolin-2-ylamine, 6-Benzofuran-2-yl-4-isopropoxy-quinazolin-2-ylamine, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-methyl-benzamide, 6-Furan-2-yl-4-isopropoxy-quinazolin-2-ylamine, 4-Isopropoxy-6-thiophen-3-yl-quinazolin-2-ylamine, 4-Isopropoxy-6-pyridin-3-yl-quinazolin-2-ylamine, 6-(3,4-Difluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine, 4-Isopropoxy-6-pyridin-4-yl-quinazolin-2-ylamine, 3-(2-Amino-4-isopropoxy-quinazolin-6-yl)-benzonitrile, 6-(3,5-Difluoro-phenyl)-4-isopropoxy-quinazolin-2-ylamine, 4-Isopropoxy-6-(4-trifluoromethoxy-phenyl)-quinazolin-2-ylamine, 6-(4-Amino-phenyl)-4-isopropoxy-quinazolin-2-ylamine, 4-Isopropoxy-6-(2,3,4-trifluoro-phenyl)-quinazolin-2-ylamine, 6-(2-Benzyloxy-phenyl)-4-isopropoxy-quinazolin-2-ylamine, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-benzonitrile, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenol, 4-Isopropoxy-6-quinolin-3-yl-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(2,4-difluoro-phenyl)-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(2,3-difluoro-phenyl)-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-o-tolyl-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(3-trifluoromethyl-phenyl)-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-p-tolyl-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(2,4-dichloro-phenyl)-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(4-ethoxy-phenyl)quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(2-chloro-4-fluoro-phenyl)-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-furan-3-yl-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(3-chloro-4-fluoro-phenyl)-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(2H-pyrazol-3-yl)-quinazolin-2-ylamine, 6-Benzofuran-2-yl-4-cyclobutylmethoxy-quinazolin-2-ylamine, 4-(2-Amino-4-cyclobutylmethoxy-quinazolin-6-yl)-N-methyl-benzamide, 4-Cyclobutylmethoxy-6-furan-2-yl-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-thiophen-3-yl-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-pyridin-3-yl-quinazolin-2-ylamine, 3-(2-Amino-4-cyclobutylmethoxy-quinazolin-6-yl)-benzonitrile, 4-Cyclobutylmethoxy-6-(2H-pyrazol-4-yl)-quinazolin-2-ylamine, 4-Cyclobutylmethoxy-6-(2,3,4-trifluoro-phenyl)-quinazolin-2-ylamine, 4-(2-Amino-4-cyclobutylmethoxy-quinazolin-6-yl)-benzonitrile, 4-(2-Amino-4-cyclobutylmethoxy-quinazolin-6-yl)-phenol, 6-(2-Chloro-4-trifluoromethyl-phenyl)-4-cyclobutylmethoxy-quinazolin-2-ylamine, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N,N-dimethyl-benzamide, [4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenyl]-pyrrolidin-1-yl-methanone, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N,N-dimethyl-benzamide, [4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenyl]-morpholin-4-yl-methanone, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-benzyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-isobutyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-cyclohexyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-butyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-tert-butyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-cyclopentyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-isopropyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-methoxy-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-furan-2-ylmethyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-(2-dimethylamino-ethyl)-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-pyridin-2-yl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-(4-fluoro-phenyl)-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-(4,5-dihydro-thiazol-2-yl)-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-2-chloro-N-methyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-2-chloro-N-cyclopropyl-benzamide, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-phenol, 3-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-phenol, 4-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-cyclopropyl-benzamide, 3-(2-Amino-4-cyclopropylmethoxy-quinazolin-6-yl)-N-methyl-benzamide, [4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenyl]-piperidin-1-yl-methanone, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-benzyl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-isobutyl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-cyclohexyl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-butyl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-tert-butyl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-cyclopentyl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-isopropyl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-methoxy-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-furan-2-ylmethyl-benzamide, [4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenyl]-thiazolidin-3-yl-methanone, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-(2-dimethylamino-ethyl)-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-pyridin-2-yl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-(4-fluoro-phenyl)-benzamide, [4-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenyl]-thiomorpholin-4-yl-methanone, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-(4,5-dihydro-thiazol-2-yl)-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-2-chloro-N-methyl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-2-chloro-N-cyclopropyl-benzamide, 3-(2-Amino-4-ethoxy-quinazolin-6-yl)-phenol, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-cyclopropyl-benzamide, 3-(2-Amino-4-ethoxy-quinazolin-6-yl)-N-methyl-benzamide, [4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenyl]-piperidin-1-yl-methanone, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-benzyl-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-isobutyl-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-cyclohexyl-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-butyl-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-tert-butyl-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-cyclopentyl-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-isopropyl-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-methoxy-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-(2-dimethylamino-ethyl)-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-(4-fluoro-phenyl)-benzamide, [4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenyl]-thiomorpholin-4-yl-methanone, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-(4,5-dihydro-thiazol-2-yl)-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-2-chloro-N-methyl-benzamide, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-2-chloro-N-cyclopropyl-benzamide, 3-(2-Amino-4-isopropoxy-quinazolin-6-yl)-phenol, 4-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-cyclopropyl-benzamide, 3-(2-Amino-4-isopropoxy-quinazolin-6-yl)-N-methyl-benzamide, 4-Ethoxy-6-[4-(5-methy-[1,3,4]oxadiazol-2-yl)-phenyl]-quinazolin-2-ylamine, 4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-isobutyl-benzamide, 4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-cyclopentyl-benzamide, 4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-isopropyl-benzamide, 4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-methoxy-benzamide, {4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-phenyl}-thiazolidin-3-yl-methanone, 4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-phenol, 3-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-phenol, 4-[2-Amino-4-(2-hydroxy-ethoxy)-quinazolin-6-yl]-N-cyclopropyl-benzamide, {4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenyl}-piperidin-1-yl-methanone, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-benzyl-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-isobutyl-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-butyl-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-tert-butyl-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-cyclopentyl-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-isopropyl-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-methoxy-benzamide, {4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenyl}-thiazolidin-3-yl-methanone, {4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenyl}-thiomorpholin-4-yl-methanone, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-(4,5-dihydro-thiazol-2-yl)-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-2-chloro-N-methyl-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-2-chloro-N-cyclopropyl-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenol, 3-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-phenol, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-cyclopropyl-benzamide, 4-[2-Amino-4-(2-fluoro-ethoxy)-quinazolin-6-yl]-N-methyl-benzamide, (S)-4-[2-Amino-4-(tetrahydro-furan-2-ylmethoxy)-quinazolin-6-yl]-N-cyclopropyl-benzamide, 4-(2-Amino-4-ethoxy-quinazolin-6-yl)-benzamide, (S)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-cyclopropyl-benzamide, (S)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(2-dimethylamino-ethyl)-benzamide, (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(2-morpholin-4-yl-ethyl)-benzamide, (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(2-pyrrolidin-1-yl-ethyl)-benzamide, (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(2,2,2-trifluoro-ethyl)-benzamide, (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(3-pyrrolidin-1-yl-propyl)-benzamide, (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-[2-(1-methyl-pyrrolidin-2-yl)-ethyl]-benzamide, (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(1,1-dimethyl-2-morpholin-4-yl-ethyl)-benzamide, (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(1,1-dimethyl-2-pyrrolidin-1-yl-ethyl)-benzamide, (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(1-cyano-cyclopropyl)-benzamide, (R)-4-[2-Amino-4-(tetrahydro-furan-3-yloxy)-quinazolin-6-yl]-N-(1-isopropyl-piperidin-4-yl)-benzamide, 6-(2,4-Bis-trifluoromethyl-phenyl)-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine, 6-Benzofuran-2-yl-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine, 6-(3-Chloro-4-fluoro-phenyl)-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine, 6-(2,4-Dichloro-phenyl)-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine, 4-(3-Dimethylamino-propoxy)-6-(3,4,5-trifluoro-phenyl)-quinazolin-2-ylamine, 4-(3-Dimethylamino-propoxy)-6-(3,5-dimethyl-phenyl)-quinazolin-2-ylamine, 6-(4-Chloro-phenyl)-4-(3-dimethylamino-propoxy)-quinazolin-2-ylamine, 4-(3-Dimethylamino-propoxy)-6-(3-trifluoromethyl-phenyl)-quinazolin-2-ylamine, 6-(4-Chloro-3-trifluoromethyl-phenyl)-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine, 4-[2-Amino-4-(2-morpholin-4-yl-ethoxy)-quinazolin-6-yl]-phenol, 4-(2-Morpholin-4-yl-ethoxy)-6-thiophen-3-yl-quinazolin-2-ylamine, 4-(2-Morpholin-4-ykethoxy)-6-thiophen-2-yl-quinazolin-2-ylamine, 6-Benzofuran-2-yl-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine, 6-Furan-3-yl-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine, 6-Benzo[b]thiophen-2-yl-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine, 4-(2-Morpholin-4-yl-ethoxy)-6-(2-trifluoromethyl-phenyl)-quinazolin-2-ylamine, 4-(2-Morpholin-4-yl-ethoxy)-6-(3-trifluoromethyl-phenyl)-quinazolin-2-ylamine, 6-(2,3-Difluoro-phenyl)-4-(2-morpholin-4-yl-ethoxy)-quinazolin-2-ylamine, 4-isopropoxy-6-thiophen-3-yl-quinazoline, 4-(4-Isopropoxy-quinazolin-6-yl)-N-methyl-benzamide, 4-(4-(2-methoxyethoxy)-quinazolin-6-yl)-N-methyl-benzamide, 4-ethoxy-6-(1H-pyrazo-4-yl)-quinazoline, 6-(4-Fluoro-phenyl)-4-isopropoxy-quinazoline, (S)-4-(2-(4-fluorobenzylamino)-4-(tetrahydrofuran-3-yloxy)quinazolin-6-yl)-N-(2-(dimethylamino)ethyl)benzamide, 4-{[4-Ethoxy-6-(4-fluoro-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide, 4-{[6-(3-Cyclopropanesulfonylamino-4-fluoro-phenyl)-4-ethoxy-quinazolin-2-ylamino]-methyl}-benzenesulfonamide, 4-{[6-(3-aminosulfonyl-phenyl)-4-ethoxy-quinazolin-2-ylamino]-methyl}-benzenesulfonamide. Pyrrolidine-1-carboxylic acid {4-[4-ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-phenyl}-amide, 4-{[4-Ethoxy-6-(4-ureido-phenyl)-quinazolin-2-ylamino]-methyl}-benzenesulfonamide, 4-[4-Ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-benzamide, N-Cyclopropyl-4-[4-ethoxy-2-(4-sulfamoyl-benzylamino)-quinazolin-6-yl]-benzamide, 4-Ethoxy-2-(4-fluorobenzylamino)-6-(4-fluoro-phenyl)-quinazoline, N-Cyclopropyl-4-[4-ethoxy-2-(4-fluorobenzylamino)-quinazolin-6-yl]-benzamide, and 6-(4-Fluoro-phenyl)-4-propyl-quinazoline, and/or a pharmaceutically acceptable addition salt thereof and/or a stereoisomer thereof and/or a mono- or a di-N-oxide thereof and/or a solvate thereof and/or a pro-drug form thereof.
 22. A quinazoline derivative according to claim 20, wherein R′ and R″ are each hydrogen.
 23. A pharmaceutical composition comprising a 4,6-disubstituted or 2,4,6-trisubstituted quinazoline derivative according to claim 20, and one or more pharmaceutically acceptable excipients.
 24. A pharmaceutical composition comprising 4-ethoxy-6-(4-fluorophenyl)-quinazoline and one or more pharmaceutically acceptable excipients.
 25. A pharmaceutical composition according to claim 23, further comprising one or more other antiviral agents.
 26. A pharmaceutical composition according to claim 23, further comprising one or more antiviral agents selected from the group consisting of interferon alpha, ribavirin, NS3 protease inhibitors, and nucleoside- or non-nucleoside-based inhibitors of NS5B polymerase.
 27. A method of treating or preventing a viral infection by administering to a patient in need thereof a therapeutically effective amount of a 4,6-di-substituted or 2,4,6-trisubstituted quinazoline derivative according to claim
 20. 28. A method of treating or preventing a viral infection by administering to a patient in need thereof a therapeutically effective amount of 4-ethoxy-6-(4-fluorophenyl)-quinazoline.
 29. A process for preparing a 4,6-disubstituted or 2,4,6-trisubstituted quinazoline derivative according to claim 20, comprising the step of reacting (a) a quinazoline intermediate having a group R₂ in position 2 of the quinazoline scaffold, a chloro or 1,2,4-triazolyi group in position 4 of the quinazoline scaffold, and a group Y—R₆ or halogen in position 6 of the quinazoline scaffold, wherein each of R₂, R₆ and Y is as defined in the structural formula (I), with (b) a nucleophilic reagent R₄AM, wherein R₄ is as defined in the structural formula (I), A is selected from oxygen and sulfur, and M is an alkaline metal.
 30. A quinazoline derivative according to claim 20, wherein R′ is hydrogen and R″ is phenyl optionally substituted with one or more halogens.
 31. A quinazoline derivative according to claim 20, wherein R₄ is C₁₋₄ alkyl optionally substituted with one or more R₇.
 32. A quinazoline derivative according to claim 20, wherein R₆ is bromo.
 33. A quinazoline derivative according to claim 20, wherein R₆ is heteroaryl or phenyl optionally substituted with one or more R₈.
 34. A quinazoline derivative according to claim 31, wherein R₇ is selected from the group consisting of halogen, cyano, C₁₋₇ alkyl optionally substituted with one or more halogen, C₁₋₇ alkoxy optionally substituted with one or more halogen, —CO—NHR₉, —NR₁₂—COR₁₀, cycloalkyl, aryl, aryloxy and heterocyclyl.
 35. A quinazoline derivative according to claim 33, wherein R₈ is selected from the group consisting of halogen, cyano, C₁₋₇ alkyl optionally substituted with one or more halogen, C₁₋₇ alkoxy optionally substituted with one or more halogen, —CO—NHR₉, —NR₁₂—COR₁₀, cycloalkyl, aryl, aryloxy and heterocyclyl.
 36. A quinazoline derivative according to claim 35, wherein R₉ is selected from the group consisting of hydrogen; C₃₋₁₀cycloalkyl optionally substituted with cyano; C₁₋₇alkyl optionally substituted with one or more substituents selected from the group consisting of dialkylamino, halogen and heterocyclyl optionally substituted with C₁₋₇alkyl; heterocyclyl; aryl and arylC₁₋₇alkyl wherein the aryl moiety is optionally substituted with one or more halogens.
 37. A quinazoline derivative according to claim 35, wherein R₁₀ is C₁₋₇ alkyl and R₁₂ is hydrogen. 